Su Manqi, a very ordinary girl with a dark heart, likes to watch the sunrise and dusk. When day and night alternate, I feel like I have exchanged lives with others, and I slowly change my personality and behavior in my fantasy. Grow up little by little. Until you completely become the person you imagined. When the classmate looked back on her past experience and felt very scared, her good friends told her parents and sent her to a mental hospital. When she is willing to think that she is a psychopath. Suddenly she disappeared and came to a different world...