This is a story about a security guard agency and its three agents-Michael, Sam and Ricky. Sam and Ricky are delivering a large sum of money to a bank when a robbery takes place under their nose. after a series of hair-raising about hilarious chases, the agents get their men. With Michael and Sam giving their reward money to Ricky. They live haphazardly ever after.
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.
In Hong Kong, Circa 1940s, World War II, private detective Yoyo and friend Inspector Teddy Robin join a resistance group during the Japanese occupation. They aim to steal back the formula to the atomic bomb from a war traitor and transfer it to an American before the formula ends up in the Japanese emperor's hands.
