A Yong (Wan Ziliang is acted the role of), A Guo (Andy Lau is acted the role of) two brothers roam the streets of Hong Kong, took refuge in the underworld state chief drug elder brother (Chow Yun Fat). As A Guo was appreciated by Brother Yao, it caused Ah Yong's jealousy and estrangement between the brothers. Ah Yong turned to Boss Zhu, but A Guo went to Singapore to find another livelihood. A few years later, A Yong had full wings, killed Boss Zhu, and designed to wipe out the gang of Brother Yao. Brother Yao was killed, and he fled to Singapore alone to find A country, and A Yong hunted him step by step. Brother Yao's wife (Liu Jialing) and children were killed step by step. Now grief and resentment urge A country to come out again and return to Hong Kong with Brother Yao to fight with death and revenge.