Ah Long (Chow Yun Fat), a former motorcycle racer who lived the life of a wastrel, womanizing, drinking and beating his pregnant girlfriend, Por Por (Sylvia Chang) 10 years ago. He was injured in a terrible accident while trying to outrun the police in one of his escapades and was sentenced to jail. After his release, he tries to put a life together for himself and his son (Huang Kun Husen) as a truck driver for a quarry. A chance encounter brings Por Por back into the life of Ah Long and to the son whom she was told had died at birth. While Ah Long hopes for a re-union, Por Por only wants to take the boy back to the U.S. for a new, orderly life. In an attempt to prove himself, Ah Long decides to take a chance at the race track for one last time...