Doctor Shin

Momo is left near brain-dead after an accident. Her mother proposes a dangerous brain-switch surgery, offering her own brain to save her. Believing this isn't real living, she pushes forward despite the risks, driven by extreme sacrifice.

Six months prior to Momo's accident, Dr. Shin persistently pursues her despite her hesitation. Although she gradually starts to soften, her mother strongly disapproves of the relationship. At the same time, Ha Yong-jung recognizes Geum Bara, and their reunion reopens a long-buried past.

After the brain transplant surgeries, both Momo and Ran-hee wake up, but in each other's bodies. While Ran-hee, now in Momo's body, recovers well, Momo is left nearly brain-dead in Ran-hee's body. Bara senses that something is suspicious about the case, while Yong-jung also feels an unsettling vibe from Jusin.

Ran-hee is pronounced dead. However, those who knew her find it hard to believe she would take her own life. Meanwhile, the real Ran-hee continues to inhabit Momo's body, pretending to mourn while secretly feeling excited about the possibilities of her new life.

Paul Kim searches for his biological daughter and meets Kim Jin-ju to find out if they're related. Meanwhile, Yong-jung and Bara keep running into each other, growing closer despite their complicated feelings.

A man claiming to be Jin-ju's father enters her life with suspicious motives, growing increasingly possessive and revealing a shady past. Meanwhile, Dr. Shin reaches out to her with a life-changing offer. What will she choose?

After another brain-swap surgery, now it's Jin-ju's turn to live in Momo's body. She embraces her new identity, but grows increasingly resentful of those around her. Meanwhile, her father continues to believe she's still alive, as her original body has yet to be found.

Jin-ju grows more fearless in front of Jusin. Meanwhile, Bara attracts Jusin's attention and they spend more time together. Yong-jung continues to pine for Momo, while Bara becomes increasingly jealous.

Jin-ju, in Momo's body, reveals she had a miscarriage and that Jusin hit her, leading her to end their engagement. Bara continues grappling with her feelings for Yong-jung, while Jusin becomes increasingly drawn to Bara. Meanwhile, Jin-ju grows closer to Yong-jung to provoke Bara.

Jusin proposes to Bara after becoming infatuated with her, but she is reluctant, as she doesn't believe he truly loves her. Meanwhile, Jin-ju continues flirting with Yong-jung, as Momo, and grows increasingly annoyed as Jusin showers Bara with attention.

Yong-jung warns Bara to stay away from Jusin, but the warning only brings the two of them closer. As Jusin continues pursuing Bara, Jin-ju discovers that he proposed to her and is consumed by rage.

After a one-night stand, Yong-jung reluctantly decides to marry Bara, but still sees her as the little girl from his past. Bara is initially overjoyed, but soon realizes she can't force his feelings. Hurt, she leaves and ends up staying with Jusin to recover.

Yong-jung and Momo are preparing for their upcoming wedding. At the same time, Bara accepts Jusin's marriage proposal. However, Bara becomes increasingly tense and uneasy due to Momo's unusual behavior, suspecting that something more sinister may be happening beneath the surface

Bara discovers she is pregnant with Yong-jung's baby and goes into hiding. Six months later, Yong-jung and Momo struggle to conceive, and he gradually begins to see Momo's true selfish nature. Amid growing turmoil and doubt, Yong-jung can only think of Bara, who has disappeared without a trace.

After discovering the truth about her birth parents, Bara pieces together her connection to Momo and reflects on their growing friendship. Yong-jung becomes convinced Bara may have been carrying his child and continues searching for her. Jin-ju's father finally confronts Momo, while Jin-ju proposes that she and Bara undergo a brain switch.

After another surgery, Bara wakes up in Momo's body. Jin-ju's father gets closer to uncovering the truth about Momo, Jin-ju, and Bara. Paul Kim finally learns his connection to Bara, while Yong-jung discovers the identity of Bara's baby's father.