One day in the casino, a stranger shows up and wins a lot of money. AH LOON asks CHOU to give him a try but CHOU refuses. Instead he finds out that the stranger is well- acquainted with his mistress U LAN and that they have unusual relationship. In anger, he proposes the challenge. They bet on their lives and CHOU loses. It bursts into a fight and CHOU flees. Later he discovers that the whole plot is designed by AH LOON.