Ruo Yi, a girl who studies literature. For her graduation project, she meets Chen Mo, who lives in the room 413 of Time Hotel. Chen Mo, injured his head in an accident and can only preserve one-day memory. Everything happened last day will be erased when he wakes up the other morning. Chen Mo lost all his memory, even his own identity. But he never forgets to looking for his love, Xiao Xiao. Ruo Yi has met a girl who might be Xiao Xiao at the first time she went to Room 413. For finishing her graduation novel in this inspiring Time Hotel, and also holding the sympathy of the lost Chen Mo, Ruo Yi starts to help him to looking for Xiao Xiao...