Original: 마인
Encaged in a gold-clad life of secrets and lies, two women in a conglomerate family seek to topple all that stands in their way of finding true joy.
Kim Yu-yeon begins working as Jung Seo-hyun's maid. Kang Ja-kyeong enters Seo Hi-soo's home as the new tutor. Han Suk-chul collapses at a family dinner.
Han Soo-hyuk and Yu-yeon fall asleep in each other's beds. Guided by Mother Emma, Seo-hyun peers inside her heart to see what and who's inside.
Han Jin-ho is appointed as the company's temporary president. Hi-soo is startled by a suddenly distant Han Ha-joon and an overstepping Ja-kyeong.
Soo-hyuk tries to convince Yu-yeon to return to the Hyowon residence. Uncomfortable with Ja-kyeong's strong attachment to Ha-joon, Hi-soo fires her.
Hi-soo and Seo-hyun look into Ja-kyeong, who's set on reclaiming what was once hers. An article details Ha-joon and Soo-hyuk's family ties.
With news of Hi-soo's pregnancy, Seo-hyun contemplates telling her about Ha-joon's birth mother. Han Ji-yong ousts Ja-kyeong to protect his family.
Hi-soo learns of Ja-kyeong's motive, Yang Soon-hye's involvement and Ji-yong's lies. Seo-hyun faces off against Ji-yong to protect Hyowon.
Hi-soo suffers a devastating loss and recovers in secret. A week later, she returns with renewed resolve to walk out of Hyowon no matter what.
Suk-chul's will is read out loud, revealing the fate of each family member. Ja-kyeong and Hi-soo prepare to take their custody battle to court.
Moved by her conversation with Suzy Choi, Seo-hyun decides to prioritize Soo-hyuk's happiness. Hi-soo catches Ji-yong off guard in the courtroom.
Bound by a common goal and nemesis, an unlikely ally joins Hi-soo’s fight. News of the company heir shakes up the family with a return and a departure.
Hi-soo is caught in a distressing dilemma: escape Hyowon by exposing Ji-yong's evil deeds, or shield Ha-joon from learning the ugly truth?
Seo-hyun prepares to take ownership of both her identity and Hyowon Group. The police investigate suspicions surrounding Ji-yong's death.
In flashbacks, various suspects and their motives are revisited days before the murder. A skeptical detective questions Hi-soo's amnesia.
The detective's distrust of Seo-hyun and Hi-soo grows, despite the family members' statements that Ji-yong's death was most likely a suicide.
The truth — and what Seo-hyun and Hi-soo desperately wanted to protect — is revealed as events from the night of the murder unfold in its entirety.
