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.

Zuo Yi Quan, a talented Taiwanese high jumper, inspires Lu Rui Xi, who disguises herself as a boy to attend his all-boys school, sparking romantic complications.