The Hong Kong police and criminals are "two sides", one side is the anti-racing police station that maintains Hong Kong's traffic order, and the other side is the DC underground racing gang that does all kinds of evil. The whole film revolves around an underground racing race, involving the life and death grudges of two generations. Is the revenge for the murder of his father the truth or a plan of evil forces? The coexistence of fog and clues makes people want to find out.