Sequel to the comedy movie Lam Ah Chun

Two men each possess half of a treasure map, but over the years, their greed has prevented either from actually finding the treasure. But it seems that they may now be too late, as a third man plots to steal the treasure right out from under them.

After being cheated out of some money, two small time crooks convince a martial arts expert to take them on as students.

Youthful martial arts master Lung is searching for his missing brother, when he is mistaken for a criminal on the run. He must prove his innocence by solving the case himself, while local lawmen and merciless mercenaries are hot on his trail.

Li (Sam Hui) works at a sanitarium as a male nurse, and Ah Tim (Michael Hui) is a handy man. One day, a bearded old man is sent into the sanitarium with a large bag. Ah Tim manages to steal the bag, and finds antique fragments inside. When the old man dies, the pair learn from his daughter that there is a sunken vessel that is loaded with much more than they already have, so they decide to go after the sunken treasure.