Song Zihao (played by Tommy Tam) and Mark (played by Chow Yun Fat) are important figures in an international counterfeit banknote group and close friends with siblings. Song Zihao's younger brother Song Zijie (Leslie Cheung) has just been admitted to the police school, and his girlfriend Zhong Rou (Zhu Baoyi) is smart and sensitive, and she has a deep love for Zijie. Once, Song Zihao took his subordinate Tan Cheng to Taipei to trade counterfeit money with the local gang. Unexpectedly, Tan Cheng had already colluded with the Taipei gang to betray Zihao.
Song Zihao was injured in a gun battle and was captured by the police who came to jail. Mark learned that Song Zihao was arrested and went to Taipei alone to kill the gang leader. He was also seriously injured and fled the scene with difficulty. At the same time, the Taiwanese gang, fearing that Zihao would leak secrets to the police in prison, sent people to Hong Kong to kidnap Hao's father, who died in the melee. Song Zihao's disciple Jie learned that his elder brother was the leader of the counterfeit banknote group, and his father died for him, so he hated Zihao and the underworld and determined to eliminate the violence. Three years later, Song Zihao was released from prison and returned to Hong Kong.
Tan Cheng, who betrayed Song Zihao, has now become the boss. He hypocritically asked Song Zihao to cooperate, but was rejected, so he designed to harm Song Zijie. Song Zihao couldn't bear it, and Mark stole the computer floppy disk that Tan Cheng made counterfeit banknotes, and then handed it to Song Zijie. But at the same time, they pretended to use floppy disks to do business with Tan Cheng, and planned to capture Tan Cheng alive during the transaction. Unexpectedly, Tan Cheng had already prepared, and the two sides started a gun battle at the dock. At this time, Song Zijie also drove over, and Mark died in the fierce battle. The police swarmed and surrounded the pier. In order not to hurt Song Zijie, after Song Zihao shot and killed Tan Cheng, he took off the handcuffs from Song Zijie and restrained himself, and surrendered to the police. The two brothers finally made up
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