Song Zihao (played by Ti Lung) and Mark (played by Chow Yun-fat), two important members of an international counterfeit banknote group in Hong Kong, are brothers. When Song Zihao and his subordinate Tan Cheng (played by Li Zixiong) went to Taipei for a transaction, they were betrayed by him and shot and arrested. To avenge his good brother, Mark went to Taiwan alone, but was beaten into a cripple. His status in the underworld plummeted, and Song Zihao's father died soon after. Song Zijie (played by Leslie Cheung), who always regarded Song Zihao as an idol, hated the underworld and him after learning his brother's true identity. He vowed to use his police identity to eradicate the gang forces. After Song Zihao was released from prison, he ignored Mark's dissuasion who was waiting for him to regain his glory and decided to give up the dark and join the light, but he could not get Song Zijie's forgiveness. At this time, Tan Cheng, who had become the boss of the gang, wanted to find Song Zihao to cooperate again. After being rejected, he said that he would harm Song Zijie. Being forced into a desperate situation, Song Zihao decided to join hands with Mark to fight against the powerful enemy again.