Lau Ching, a Mainlander with an incredibly powerful right arm, arrives in Hong Kong to find his cousin. He befriends with a drifter named Handsome, and a martial artist girl named Mandy.

After the total defeat of his love rival, Ching must now deal with the love rival's brother, Wan To, who seeks revenge against him. When Ching is ambushed by Wan To and his gang in the streets and ...