After being haunted by evil spirits inside a residential building, a security guard seeks help from a mysterious exorcist, who turns out to be an escaped mental patient.
| Actor | Role |
|---|---|
 Stephen ChowLeon | Leon |
 Karen Mok Man-WaiKwan | Kwan |
 Lo HungCaptain Lu | Captain Lu |
 Wong Yat-FeiBallsy | Ballsy |
 Lee Kin-YanBig Cat | Big Cat |
 Lee Lik-ChiLittle Cat | Little Cat |
 Ben Wong Chi-YinKeung | Keung |
| BBill Chan Wing-BiuJunkie Ming | Junkie Ming |
| HHeung DipChang / Beard | Chang / Beard |
| BBruce Mang LungMung | Mung |
 Carol TamMrs. Li | Mrs. Li |
 Chow Chi-FaiMr. Li | Mr. Li |
 Hau Woon-LingMr. Li's Dead Mother | Mr. Li's Dead Mother |
 Bryan LeungMr. Wu | Mr. Wu |
 Lam SuetEatery Assistant | Eatery Assistant |
 Chik King-ManWoman in Red | Woman in Red |
 Cinda Hui Sze ManMrs. Zhang | Mrs. Zhang |
 Jackson Ha Chak-ShunMental Hospital Staff | Mental Hospital Staff |
| WWong Kam-TongKwan's father | Kwan's father |
| LLeung ChoiLawyer | Lawyer |