Bun, a schizophrenic, former police inspector comes out of retirement to help a rookie detective solve a complex murder case involving a missing colleague and a suspected policeman suffering from a multiple personality disorder.

Lau Ching-Wanas Inspector Chan Kwai Bun
Andy On Chi-Kitas Inspector Ho Ka-on
Gordon Lam Ka-Tungas Ko Chi Wai
Kelly Lin Hsi-Leias May Cheung
Karen Lee Choi-Lingas Gigi
Joseph Lee Kwok-Lunas Wong Kwok Chu
Cheung Siu-faias Violent Man - Ko's Inner Personality
Lam Suetas Fatso - Ko's Inner Personality
Jay Lau Kam-Lingas Calculating Woman - Ko's Inner Personality
Cheng Siu-Keung