A cellist is haunted by strange events after a car wreck.

Arnold is a popular online erotic fiction writer famous for his ‘Sex with senior student’s girlfriend’ and ‘Friend’s older sister series’. However, he is writer Dong-myeong (Choi Jae-hwan) in reality, who dreams of winning the New Spring Literary Contest and works as tutor at a preparatory school to make a living. One day, his first love So-yeon (Wang Bit-na) appears in front of him. She claims the copyright of his novel, ‘Sex with senior student’s girlfriend’ and asks him to share the profit he has made from the novel so far.

Yoo-yi, who lost her parents at a young age, is now the teacher of Eung-bo High School, where her father worked at 20 years ago before his death. Hoping to find out a little more about her parents that she now remembers little of, Yoo-yi moves into where her family used to live in but starts to see paranormal phenomena. Do they have anything to do with her parents' deaths?