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. In order to woo her, Ching participates in a fighting competition in hopes of winning a $10 million prize, and must defeat his love rival, Wai, in the ring.
Sing, a dumb, lovable mainlander with supernatural powers comes to China to visit his uncle Tat. When it's revealed that Sing can see through objects, Tat employs him as "The Saint of Gamblers," and proceeds to set him loose in the gambling world.
Star Chow, an officer in the elite police unit, resigns when he is made a scapegoat for a botched investigation. He goes undercover at a school to complete the case and realizes a bumbling detective is also undercover as a student.