Joon-ha had the best night of his life with an older woman he met while drinking. He starts looking for her as he can't forget the feeling and finally they meet. However, she's going to become his new stepmom. She's his father's girlfriend. When the three start living together, things turn edgy and then dangerous when his father leaves the house one day.
Happy couple Tae-seop and Jeong-hwa, who are about to get married, disappear one day, and Jeong-hwa is psychiatrically diagnosed with the spirit that her boyfriend Tae-seop is a fictional character. Jeong-hwa, who is struggling, falls in love with Jeong-gook, a psychiatrist who takes care of her. Meanwhile, Tae-seop who disappeared was kidnapped after being gaslighted by his ex-girlfriend Soo-ri.
Mi-yeon, as if running away to the countryside from one's husband's wrong guarantee, runs away as she could't stand her pathetic husband but lost her way. As she was finding her way, a man from next door happened to find her and asks her to sleep over at his house. As night fell, the man next door took her body.
