Chan Wan-sing (Chen Kuan-tai) has retired from the underworld for many years and often inculcates his son Wah (Mark Cheng), hoping that his son will not step into his footsteps. However, Wah had secretly colluded with Mad Man (Shing Fui-On) in dealing with illegal business. While on the other hand, Chan greatly cares for his adopted daughter Joey (Rosamund Kwan) as if she was his biological child and is also very proud of Joey's husband, police inspector Man Yung-keung (Alex Man) of the Regional Unit of Hong Kong.