Top star Mo-mo falls into a coma after an unexpected accident. Her mother, Ran-hee, proposes a shocking solution to Mo-mo's lover, neurosurgeon Ju-shin, to transfer Mo-mo's soul into her own body through a brain transplant. Although it is a dangerous gamble, Ju-shin makes the fateful decision to perform the surgery.

Mo-mo goes missing after a scuba diving accident. Ba-ra, a journalist, senses something suspicious about the case, while Yong-jung also feels an unsettling vibe from Ju-shin. Meanwhile, Ba-ra reveals the engagement of Ju-shin and Mo-mo in an exclusive interview without informing him, as Mo-mo calls 911 to report her mother's death.