Ye-hwa, who lost Jeong-in and was humiliated by the sudden attack on her soul on the day of her death, tries to kill herself to escape from the monster who is obsessed with her, but when she opens her eyes again, she returns to 10 years ago and meets the monster who takes care of her… Who the hell is this creature that is not in her memory, and why has he ruined herself so much in the future while taking care of her in the past? Can she change the past and create a different future?