Growing up in the underworld, Ah Fei (Tony Leung) and Ah Ji (Jacky Cheung) have a friendship of more than 20 years. The two who dream of joining the underworld usually just mess around: they escape from the battlefield when they are hacking people, steal the gold watch from the boss's body, and they do these things without blushing. Ah Fei and Ah Ji have the magical trait of killing the boss. Each of their bosses has a very miserable end, and all died at the hands of the underworld gangster Guan Gong (Tang Zhenye). For a time, the two's reputation as "boss nemesis" resounded throughout the underworld, and even their good friend Bo Ge (Eric Tsang) did not dare to take them in. The two had to withdraw from the underworld and borrow money to start a trading company, but the first business was to deceive Singaporean woman Ah Zhen (Anita Yuen) into selling herself. The two who could not bear to force good women into prostitution made a big fuss in the underworld, and were taken away by Guan Gong's men at the critical moment of life and death. It turned out that Guan Gong, who believed in fate, wanted to rely on the two's hard lives to survive the disaster. So, the two who had been crawling in the underworld for many years finally ushered in the day of turning over...