Sunny Chan
Because of his misbehavior, Tsui Fei (Louis Koo) is a sergeant sent to work with Senior Inspector Kong Tze Shan's (Sunny Chan) homicide team at the Hong Kong Central Police Station. He has been emotionally unstable since the disappearance of his girlfriend Leung Chin Chin (Anne Heung) three years earlier. At first, his attitude is not welcomed by the other officers, especially Hon Kwok Yan (Edmond So), but they soon get along. Fei and Tze Shan eventually become best friends.