Yang Tao and Guo Ran meet each other on a blind date. Unexpectedly, they develop feelings towards each other. However, when Yang Tao is ready to share her whole life with him, she finds out that Guo Ran is scared of marrying her.

A woman finds the key to a room in the attic that her husband forbids her from entering. When she opens the door, she is confronted with the haunting existence of the woman her husband refuses to forget.