Original: 원더풀 월드
A mother who unfairly lost her young son, takes revenge against the perpetrator who has been forgiven by the law and heals her wounds.
Soo-hyun loses her son in an accident. When the perpetrator receives leniency, she seeks revenge.
Soo-hyun is imprisoned for seeking revenge. She is released after seven years with a duty to fulfill.
Soo-hyun goes to find Seon-yul to fulfill Hyeong-ja's request. Will she be able to do it safely?
Soo-hyun receives a photo of her husband's affair. Meanwhile, Seon-yul decides to accept the diary.
Soo-hyun is shocked to see Su-ho enter the hotel. Meanwhile, Soo-hyun takes care of Seon-yul.
Soo-hyun senses who sent the photo, and she clashes with Seon-yul, who puts himself in danger nonstop.
Soo-hyun suspects that Seon-yul may not be Hyeong-ja's victim. She tries to unveil his identity
Soo-hyun discovers Seon-yul's true identity. Can Soo-hyun protect her family from Seon-yul's revenge?
Soo-hyun is tormented by Su-ho and Yu-ri's betrayal. But Seon-yul has no intention of stopping.
Soo-hyun tells Seon-yul that his mother is more important. Seon-yul gets a call that Eun-min is awake.
After suddenly losing Eun-min, Seon-yul finds himself alone. Soo-hyun seeks out Seon-yul, and Seon-yul expresses his genuine feelings. As Soo-hyun gathers evidence on Eun-min's case, she discovers that Su-ho knew about Gun-woo's incident. Soo-hyun questions Su-ho about why he didn't dig further into the case.
Upon learning that the culprit who killed Eun-min is Kim Jun, Seon-yul is overcome by feelings of betrayal and self-loathing. Soo-hyun is determined to uncover the truth behind Gun-woo's incident and begins to investigate step by step. Soo-hyun, Seon-yul, and Su-ho each move forward with their own plans.
Soo-hyun and Seon-yul are shocked as they confront an unimaginable truth in the tablet left by Eun-min. However, the real challenge is the daunting wall that is Kim Jun, the most promising presidential candidate. Soo-hyun and Seo-nyul prepare to counterattack in their own ways.
Soo-hyun utilizes her influence as a writer to expose the truth in the media. Kim Jun turns public opinion back in his favor through deceitful tactics. Meanwhile, Seon-yul attempts a final counterattack for Soo-hyun. Having let go of everything, Soo-hyun wonders if her sincerity can move everyone.
