Fai is a kind-hearted youngster and also the leader of his friends. Once they go to Thailand for car racing and Fai meets a girl named Suet. When Fai comes back to Hong Kong, he meets Suet again, and the two fall in love with each other. Suet is a new singer and is harassed by a gangster named Twelve when she sings in a lounge. Fai helps Suet escape from Twelve, and this makes Twelve take revenge on Fai. Fai's uncle Cheung is an upright policeman and tries to fight against Twelve, but unfortunately he falls into Twelve's trap and is seriously injured. Fai decides to take his revenge against Twelve...