Xiong Ge starts a new life following the disappearance of her sons and ex-husband. She opens a hostel called The X-Dormitory, in which she treats her tenants like her family. When Room 206 mysteriously appears out of no where and out walks her ex-husband, she gets a terrible feeling in her gut that something bad is about to happen.
The story begins in the Xia Dormitory. Many years after the great war between good and evil, Xiong Ge operates a private dormitory for students and travelers. In recent years, Xiong Ge keeps trying to make herself busy, so she can forget Xia Tian, Xia Yu and Si Ren who are missing. She takes care of the students living here like her sons and daughter. One day, on Si Ren's birthday, which is also the day Xia Tian and Xia Yu went missing, a room 206 suddenly appeared in the dormitory. Grandpa thinks this is an inauspicious sign. Xiong Ge is busy in the dormitory, in addition to settling the conflicts between the tenant. However, Si Ren who was missing since the great war actually come out from room 206?! After so many years, Would the reappearance of Si Ren bring back news about the great war?