Novelist Li Wandou moves in with her white-collar boyfriend Ding Chaoyang in an affluent residential district. Chaoyang is madly in love with her, but there';s a locked room inside his large mansion that even she is forbidden to go near. One day, curiosity gets the better of her, and she enters the room to find traces of evidence that a woman once lived here. When confronted, Chaoyang admits that the room used to belong to his ex-wife, who has mysteriously disappeared for five years...