在这部妄想惊悚/恐怖片中,梁咏娜（蔡卓妍饰）因失恋变得精神恍惚。有天她遇到了与前男友阿坤十分相似的伟豪（余文乐饰），令她对生活仿佛也有了希望。好友阿仪（梁洛施饰）鼓励咏娜放下以前的不快，好好的与伟豪发展。咏娜跟伟豪很快开始交往，咏娜担心伟豪会像阿坤那样变心，终日都幻想着伟豪要离开自己，又开始坠入了妄想的深渊。
警察因伟豪的失踪，调查与伟豪有关的人，发现了一个惊人的真相。
Winnie Leung is a lonely woman that likes to make puppets and write her diary, and she misses her boy-friend Seth Lau, who left her after breaking up their relationship. Winnie leaves messages in his mail box and unsuccessfully tries to contact him in his job. When she meets Ray Fan, she tells him that his resemblance with Seth is amazing. Ray moves to her place and when Winnie's next door snoopy neighbors calls the police because of the smell in her apartment, a dark secret is disclosed in her diary.
逃逸出日记里的妄想。《妄想》——剪辑的艺术。DIVA AH HEY！。无症状妄想。可怕的爱情。回水！！！。《妄想》：梦境和现实叠加时喃喃的自语。妄想之胡说八道。老片：妄想。请问恐怖在哪里。
