建筑师托尼（梁家辉 饰）的个性十分木讷老实，以至于他暗恋同时艾琳（陈雅伦 饰）多年，却总也鼓不起勇气表白，更糟的是，艾琳已有一位感情亲密的男友，托尼的单恋似乎注定不会有结果。一次偶然中，托尼被猛鬼缠身，索性得到名为嘉嘉（关之琳 饰）的女鬼相助才得以脱身，也正因为这件事，托尼拥有了能与嘉嘉心意相通的特异功能。 　　得知了托尼的苦恋，热心的嘉嘉决定帮他一把，一番波折之后，艾琳终于离开了男友，投入了托尼的怀抱，可是，直到这时，托尼才发现自己其实早已经深深的爱上了嘉嘉，无奈人鬼殊途，无法承受分离之苦的托尼竟然决定殉情。

Building Inspector Tony (Tony Leung Ka Fai) investigates an old abandoned building in a deserted plant site and falls victim to a restless demon, who wants to resurrect into Tony's body. However, the spirit of a young woman (Rosamund Kwan) suddenly appears, saves Tony, and accidentally sucks some of his life force, thereby, sharing his feelings and emotions. The ghost falls in love with Tony, but he wants to use her to help him woo his gorgeous colleague (Ellen Chan).

토니는 건축기사로써 어느날 우연히 가가라는 여자 귀신을 만나게 된다. 그러나 우연히 가가는 토니의 입김을 마시고 이로 인해 둘은 같은 생각을 하게 되어 한쪽이 슬프면 다른 한쪽도 슬프게 된다. 토니는 같은 회사에 다니는 엘렌을 사랑하지만 엘렌에게는 남자친구가 있고 또 토니는 용기가 없어서 매번 접근하지만 실패를 한다. 그러나 가가의 도움으로 토니는 점점 엘렌과 가까워 지며 가가는 마음 속으로 토니를 사랑하게 되지만 토니는 엘렌에게 정신이 팔려 있어 이러한 가가의 마음을 모른다. 한편 가가의 어버지는 가가가 토니를 사랑하고 있다는 것을 알지만 사람과 귀신은 사랑을 해도 좋은 결말이 없다는 것을 안다. 그래서 토니가 죽으면 영원히 가가와 같이 있게 된다고 생각하고 어느날 토니의 차에 브레이크를 고장나게 해서 그를 죽이려고 한다. 결국 토니의 차가 고압전류에 휩싸이게 되고 이를 지켜본 가가 자신의 몸을 던져서 토니를 구한다. 이를 본 토니는 가가의 진심을 알게 되고 엘렌도 이런 토니의 마음을 알게 되어 토니의 곁을 떠난다. 그후 그들은 친구가 결혼식 하는날 합동결혼식을 올리는데..

โทนี่ (รับบทโดย โทนี่ เหลียง คาไฟ) ผู้ตรวจสอบอาคาร ได้เข้าไปตรวจสอบอาคารร้างแห่งหนึ่งในบริเวณโรงงานร้างแห่งหนึ่ง และได้ตกเป็นเหยื่อของปีศาจที่ไม่เคยสงบนิ่ง ซึ่งต้องการจะคืนชีพในร่างของโทนี่ อย่างไรก็ตาม จู่ๆ วิญญาณของหญิงสาวคนหนึ่ง (รับบทโดย โรซามันด์ ควาน) ก็ปรากฏตัวขึ้น ช่วยชีวิตโทนี่เอาไว้ และดูดเอาพลังชีวิตของเขาไปบางส่วนโดยไม่ได้ตั้งใจ จึงทำให้โทนี่ได้รับรู้ถึงความรู้สึกและอารมณ์ของเขา วิญญาณดังกล่าวตกหลุมรักโทนี่ แต่เขาต้องการใช้เธอเพื่อช่วยเขาจีบเพื่อนร่วมงานสุดหล่อของเขา (รับบทโดย เอลเลน ชาน)