After ten years behind the bars in Taiwan, Kong Sai-Hao finally returns to Hong Kong. Besides hoping to find his daughter Yau-Yau to mend their relationship, he also plans for revenge. On one hand, he pretends to surrender to triad boss To Yik-Tin, the man who caused him to be jailed. On the other hand, he tries to gain trust from police officers Chung Lap-Man and Lee Pak-Kiu. Pak-Kiu refuses to have a criminal as his friend, but Lap-Man becomes a undercover cop in Sai-Hao's gang. Along with Sai-Hao, they overrule Yik-Tin and take over the mafia, and the two develop a misconceived mentor-student relationship. Unfortunately, Lap-Man gets fired from the police force before he can finish his mission in the mafia. He becomes Sai-Hao's people and turns his back against the police force.
as Lee Pak-Kiu
as Chung Lap-Man
as Kong Sai-Hau
as Ching Yeuk-Sam
as Leung Siu-Tong
as Kong Yau-yau
as Fa Yeuk-Bo
as Wu Cheuk-Yan
as Fai Wing-Lun
as "Chicken" (Lat Gai)/Chu Wing-Fuk
as Ma Ying-Oi
as To Yik-Tin
