Original: 비밀의 여자
Jung Gyul Wool loses her vision and ability to walk because of her materialistic husband and his mistress. Despite her shortcomings, she hatches a plot to seek revenge.
After tying the knot with Yu Jin, Gyeo Ul moved in with him and his family. However, despite being her first birthday since the wedding, nobody in the household appears to have remembered or acknowledged it. Pressured by her mother-in-law to start a family, Gyeo Ul chooses to stop taking her bronchial medication. Meanwhile, Se Rin reunites with Tae Yang after a three-year absence, but he doesn't seem pleased to see her again.
Gyeo Ul is looking forward to her upcoming trip to a resort with Yu Jin, but she is unaware that Ae Ra, who she trusts the most, and is Yu Jin's mistress, will also be there. Tae Yang is unable to forgive himself for hurting someone and is experiencing great emotional pain because of it. Se Rin makes a foolish decision to help Tae Yang, but it leads to unforeseen condequences.
Young Ran has been robbed by a pickpocket at the department store, and she suspects Tae Yang. When she finds out that Tae Yang has a criminal record, her suspicion turns into conviction. However, Gyeo Ul tries to clear up the misunderstanding which makes Young Ran take her anger out on her.
Even though Hyun Tae forgives Yu Jin, he treats Gyeo Ul even more disrespectfully as soon as they leave his place. Se Rin blows up when Se Yeon sets her up on a blind date, and Se Yeon asks Tae Yang to move out of their house. Meanwhile, Ae Ra plots a scheme to sabotage Gyeo Ul to put out the affection Man Joong has for her.
Gyeo Ul investigates the earring and discovers that Yu Jin was its purchaser. Although Yu Jin and Ae Ra's deceitful explanations almost convince her, Gyeo Ul overhears something about Ae Ra's weekend activities that makes her suspicious. Meanwhile, Tae Yang informs his family of his desire to return to the sea, prompting Se Rin to initially react strongly but quickly compose herself and enact her backup plan to prevent Tae Yang from leaving.
Se Rin's blind date turns into a mess when Tae Yang takes the beating from her date while protecting her. Meanwhile, Ae Ra is consumed with worry that Gyeo Ul may acquire access to the corridor surveillance footage in the resort. As anticipated, Ae Ra doesn't think twice before putting Gyeo Ul to sleep in order to dispel her doubts with what she thinks is a foolproof scheme.
Se Rin finds out that she and Tae Yang have been deceived. In fact, Tae Yang has nothing to do with the murder charge he's been sentenced with. Se Rin right away looks deeper into the case, hoping to find evidence to prove Tae Yang's innocence. Meanwhile, the car accident was critical enough to take away Gyeo Ul's sight. On top of that, she needs to make a life-changing decision that involves tradeoffs.
Yu Jin shows up at the hospital late after Gyeo Ul gives birth to their daughter. As Hyun Tae witnesses Yu Jin and Ae Ra together in front of the hospital, he can't shake off his concern for Gyeo Ul. Meanwhile, Se Yeon digs into the accident five years ago and finds out there was a real culprit who framed Tae Yang.
Yu Jin kneels down in front of Hyun Tae and begs for forgiveness, which disappoints both Hyun Tae and Ae Ra. Hyun Tae visits Gyeo Ul the next day with a heavy heart, and Yu Jin's nerves are on the edge. Meanwhile, Se Yeon gets the actual name of Jang Mi through a detective agency and wants to meet her in person.
When Se Yeon visits her with a barrage of questions, Ae Ra lies to escape a difficult situation. Se Rin, frustrated at not being able to clear Tae Yang's name, take it out on Se Yeon, leading to an argument. Meanwhile, Hyun Tae suspects an affair and follows Yu Jin, only to discover something strange about Gyeo Ul's bronchial medicine.
After their misdeeds are revealed, Yu Jin and Ae Ra are in a difficult situation. They convince Hyun Tae that they can expedite Gyeo Ul's corneal transplant schedule to prevent him from exposing their secrets. Although hesitant at first, Hyun Tae ultimately agrees with their plan. Meanwhile, Se Yeon delves deeper into Ae Ra's background and takes a step that goes too far.
Ae Ra covertly places what seems like a murder weapon inside Hyun Tae's car, which leads to his eventual arrest for murder. But just as she believes that the situation is under control, Ae Ra becomes the victim of blackmail by someone from her past who has a grudge against her. At the same time, Se Rin discovers Se Yeon's past and feels remorseful for how she has treated her lately.
Hyun Tae asks Yu Jin to come clean about his affair with Ae Ra to the police to defend himself from the false accusation of murder. Furthermore, Young Jun is searching everywhere for the organ trafficker, so Yu Jin and Ae Ra have to come up with another lie. Meanwhile, Se Rin gets infuriated at Se Yeon's funeral and is determined to take revenge for her.
After her recent failure to seek revenge, Se Rin becomes even more determined to take extreme measures to achieve it. However, Tae Yang tries to prevent her from making impulsive decisions. Meanwhile, Hyun Tae is being held in solitary confinement by a corrupt officer at the detention center, and Ae Ra seeks alternative methods to make her family give up on Gyeo Ul.
Ae Ra plans to convince Gyeo Ul to visit her imprisoned father secretly, intending to separate her from her daughter So Yi and isolate her from the family. Gyeo Ul later discovers her daughter is missing and cannot find her. Meanwhile, Se Rin's uncontrolled rage leads her to inflict more pain on Hyun Tae's family than she herself is experiencing.
Gyeo Ul cannot deny the fact that she lost So Yi because of her. Not realizing how Ae Ra is behind the mess, Gyeo Ul decides that it would be better for her to stay at her parents' house until she finds So Yi. As Se Rin pursues her vendetta, Gyeo Ul becomes her next target. Later, an anonymous caller informs Gyeo Ul about a dashcam video that captures the woman who took So Yi.
Hyun Tae gets infuriated as he finds out it was Yu Jin and Ae Ra who stopped him from making calls and getting visitors, not Se Rin. Since he has no chance of getting in tough with anyone, he decides to break out of jail.
Hyun Tae collapses and is transferred to a public hospital as he did not take his pills. Meanwhile, Gyeo Ul and Young Jun try to sort things out while their father is hospitalized. Gyeo Ul tries to find out if the camera footage she saw at the resort is manipulated or not. Young Jun gets a lead on the organ trafficker who can confirm Hyun Tae's alibi.
Upon learning about Gyeo Ul's cornea transplant operation, Ae Ra formulates a scheme to deliberately sabotage it. When the surgery is unsuccessful, Ae Ra and Yu Jin openly ridicule Gyeo Ul, believing that as a blind person, she is powerless to retaliate. Despite facing opposition from all sides, Gyeo Ul remains steadfast in her resolve to hold Ae Ra and Yu Jin accountable for their actions.
Ae Ra wasn't sure if Gyeo Ul has regained her sight back or not, but she eventually figures it out. Now that she knows, she takes other measures to keep her quiet. While doing so, Ae Ra also finds out that she has something that doesn't belong to her and turns to even more extreme measures. Meanwhile, Se Rin realizes that Tae Yang was being honest when he said he wanted to go aboard with her.
After a miraculous event, Gyeo Ul finds herself in Se Rin's body due to a body switch. Now that five years have passed, Gyeo Ul is determined to take action to set things right. Meanwhile, despite Ae Ra's efforts, Yu Jin's family refuses to accept her as part of the family as long as Gyeo Ul has a chance of recovering from her vegetative state.
Se Rin learns that the USB hidden five years ago before the accident is in Tae Yang's bag. She decides to move into Jung Hye's house and live with them. Meanwhile, Yu Jin and Ae Ra plan to get divorce papers signed and stamped by threatening Gil Ja while Man Joong is away.
Gil Ja is about to sign the divorce papers for Yu Jin, but Young Jun gets released and has his charges dropped. Mal Ja tells everything about Yu Jin and Ae Ra to Man Joong. To get out of this trouble and to have him take herself in, Ae Ra takes on a difficult task at the company. However, if she manages to pull though, there might be hope for her.
Ae Ra's loss of a crucial photo jeopardizes her contract deal with VN Group and her manager position. Adding to her woes, she is transferred to a branch store and has a challenging day dealing with an unhappy customer. Meanwhile, Se Rin keeps tabs on Ae Ra for revenge, and Tae Yang searches for the deceased manager's family and Jang Mi to clear his name.
With Se Rin's assistance, Ae Ra is able to effectively close the deal with Chairman Pham and regain her position on the team. However, Se Rin intends to exploit Ae Ra's fabricated educational background to manipulate her. Meanwhile, Tae Yang is taking multiple measures to locate Jang Mi, but so far, he hasn't been able to find any leads on her whereabouts
Tae Yang finally gets a chance to inquire about the crucial missing security footage that could prove his innocence, but Ae Ra claims she has no knowledge of it or of Se Yeon. Meanwhile, Se Rin brings to light a rumour suggesting that Ae Ra may have fabricated her educational background.
Se Rin sees Tae Yang meet with Ae Ra. She finds their relationship suspicious and plans to get Tae Yang to join the YJ Group to stir things up. Meanwhile, Tae Yang saves Ji Seok in crisis while picking up Ha Neul at the welfare center and gets invited to Man Joong's house. Ae Ra sees Tae Yang at Man Joong's place and feels threatened.
Ae Ra tries to take Tae Yang apart from Man Joong by making him look like a thief. However, that plan does not fall through. On top of that, Se Rin secretly puts in an application for Tae Yang as a new recruit of YJ Group. If he gets the job and starts working with Ae Ra, he and Yu Jin might find out about each other's identity.
Ae Ra's involvement in revealing Tae Yang's criminal records to the public is aimed at hindering his job prospects, but Man Joong's decision ensures that Tae Yang can successfully go through the hiring procedures. Meanwhile, Se Rin devises a plan to create a rift between Yu Jin and Ae Ra, intending to utilize an upcoming investment meeting.
Se Rin eventually makes Yu Jin realize how Ae Ra has been lying to him all this time, and this triggers his interest in Se Rin to grow. Feeling the necessity for something more impactful, Se Rin plans to present a clear proof that explains Ae Ra's deceitfulness. Meanwhile, Young Jun finds the thugs that Gyeo Ul was running away from.
Yu Jin sees Ae Ra and Tae Yang together and takes it the wrong way. Ae Ra tries to mend her relationship with Yu Jin and attempts to win a contract with Gold Resort. Meanwhile, Se Rin notices the gap between Ae Ra and Yu Jin's relationship and sees her chance to seduce Yu Jin.
Yu Jin slowly begins to fall for Se Rin's charms. However, he can't break up with Ae Ra since she got him recognized through the Gold Resort deal. Meanwhile, Young Jun is determined to find evidence of Yu Jin and Ae Ra's involvement in Gyeo Ul's accident by joining the YJ Group.
After waking up in Se Rin's room, Yu Jin can't keep his mind off her. He looks for a way to break up with Ae Ra so that he can continue to see Se Rin. Meanwhile, Ae Ra finds it suspicious that Young Jun started working at the company and plans to get rid of him.
Young Jun is perplexed by Se Rin's eagerness to assist him in clearing his name of sexual harassment allegations and making amends for the past. Meanwhile, Se Rin devises a plan to get back at Ae Ra, who colluded with Manager Mo to accuse Young Jun of sexual harassment. To compound Ae Ra's troubles, Se Rin creates the impression that Yu Jin is concealing something from her.
Se Rin's scheming unfolds smoothly, causing Ae Ra to suspect that Yu Jin is romantically involved with Manager Mo. This prompts Ae Ra to track Yu Jin's phone in an attempt to uncover evidence of their supposed secret affair. At the same time, Yu Jin grows increasingly irritated by the close relationship between Tae Yang and Se Rin, and seeks ways to distance Tae Yang from Se Rin.
Se Rin almost gets found by Ae Ra, who was tracking Yu Jin's phone. However, Se Rin manages to escape the crisis with Yu Jin's help. After learning about Se Rin and Yu Jin's relationship, Tae Yang tries to stop Se Rin, but she doesn't listen. Meanwhile, Ae Ra grills Yu Jin about seeing another woman, but gets caught by Young Ran, who scolds her.
After learning Ae Ra's secret, Se Rin pushes Ae Ra to break up with Yu Jin, and Ae Ra struggles to find a way out of Se Rin and bar owner's threat. Meanwhile, Se Rin plans a on moving out of Jung Hye's house before Ae Ra learns about her relationship with Se Yeon.
Although Ae Ra learns something about the bar owner and uses it to escape his blackmail, she can't find anything on Se Rin. She decides to get rid of Se Rin instead. Meanwhile, Tae Yang realises he likes Se Rin.
Se Rin's attempt to elicit a confession from Ae Ra falls apart when Tae yang becomes involved. As Ae Ra becomes aware of Se Rin's intention to reveal everything to Yu Jin, she pleads for another opportunity to make amends. Meanwhile, Tae Yang's perception of Se Rin undergoes a change, and he opens up about his feeling for her. However, Ae Ra realises this and uses it to her advantage.
Having recently experienced a major life crisis, Yu Jin finds himself unable to think clearly and instead relies on Ae Ra's assistance. However, as anticipated, Ae Ra's support comes at a cost. In this case, Yu Jin's commitment to Ae Ra becomes the price to pay. Meanwhile, Ae Ra seizes this opportunity to undermine Yu Jin and Se Rin's relationship. Se Rin becomes suspicious of Yu Jin's recent behaviour of avoiding her.
Se Rin becomes aware of Ae Ra's actions, and Yu Jin continues to feel guilty for something he didn't do.
Young Jun becomes suspicious of Se Rin after hearing her call Gill Ja "Mom" and seeing her visit her in the hospital. YJ Group gets thrown into chaos over leaked documents by Yu Ri concerning a patent that has Young Jun scrambling to resolve. Meanwhile, Ae Ra takes advantage of the situation to win over Young Ran's heart.
Se Rin thinks Ae Ra could've been the one who attempted to kill Gyeo UI and starts to look for evidence. Ae Ra finds out about Se Rin's attempt to find evidence and tries to stop her. Meanwhile, Ae Ra suspects a connection between Se Rin and Gyeo UI
Ae Ra decides to falsely implicate Se Rin as the assailant in Gyeo UI's attempted murder, with the intention of probing the true extent of Se Rin and Gyeo UI's relationship. Meanwhile, Young Jun finds it peculiar to observe Ae Ra standing at a distance, watching Se Rin talk with the police, Furthermore, Se Rin's actions consistently evoke old memories of Gyeo UI within Young Jin.
Consumed by the lingering presence of Gyeo UI that he senses through Se Rin, Young Jun becomes fixated on them. Upon discovering that a business associate has a close connection to Se Rin, He decides to test Se Rin, Meanwhile, Ae Ra shows no hesitation in endangering Man Joong's life for her own personal gain.
Young Jun experiences a sense of relief as he finally unravels the truth behind the situation involving Se Rin and Gyeo UI. They seize the opportunity to reconnect and engage in meaningful conversation. In parallel, they deliberate on appropriate consequences to be meted out to Ae Ra and Yu Jin. Meanwhile, Ae Ra finds herself on the brink of an overseas transfer.
Ae Ra brings in a child impersonating So Yi, Claiming she found Man Joong's lost granddaughter, To show his appreciation, Man Joong cancel Ae Ra's appointment overseas, And Ae Ra gets reinstated to her old position, Meanwhile, Se Rin is thrilled to hear So Yi got found. But as So Yi's mother, Se Rin is heartbroken when she sees So Yi yearning for Ae Ra and can't do anything about it.
Kyung Sook, The woman who kidnapped So Yi, Enters Man Joon's house and blackmails Ae Ra after figuring out the little girl that Ae Ra brought isn't So Yi. Se Rin goes to Man Joon's place with Young Jun to see So Yi, But she witnesses Ha Neul getting blamed for something the fake So Yi did, And sadly can't take Ha Neul's side. Meanwhile, Ae Ra does her best to find the real So Yi, By meeting Kyung Sook's demands.
Se Rin discovers a picture from her old phone, showing Kyung Sook kidnapping So Yi. Without hesitation, she and Young Jun rush to Mr Nam's house. Yu Jin becomes annoyed with Se Rin always being with Young Jun whenever she visits his house. Meanwhile, Man Joong realises that Ha Neul was not the one who broke the pottery when he sees the fake So Yi claiming the doll as hers, not Ha Neul's.
Ae Ra introduced a child, claiming she was the long-lost So Yi from five years ago. Unfortunately, it was revealed that she was an imposter. The shocking news left Yu Jin and his family stunned, leading to Ae Ra immediately being asked to leave the house. Meanwhile, Se Rin prepared Kimchi rice soup for Gil Ja, who was devastated by the false So Yi revelation, while simultaneously grappling with the search for the real So Yi.
