Tuba is a fainthearted cop who prefers to play in the brass section of the police band to pounding the streets. One day, he finds himself caught up in an extortion case with trigger-happy detective Rambo Chow. When Rambo gets fatally wounded, he makes a half-hearted vow to avenge his death. Tuba is more than a little surprised when Rambo's spirit returns to make sure the timid cop makes good on his promise. Backed up by his hotshot partner Cheung, Tuba eventually summons the gumption to track down the baddies.
This film is a Hong Kong version of the British Carry On films, this one specifically set in a hospital. The hospital is full of inept people, so Miss Kuk (Meg Lam) vows to the board that she will reform it. This involves the recruitment of student nurses, keeping in check some silly interns and dealing with Dr. Chen, whose wife just left him.
Once there are two detectives in the police force, Fatty and Lanky, they have been very, very good friends, that until the day Gigi comes to their department for work. Fatty and Lanky immediately go after her skirt. Fatty and Lanky must find Boss Sin. They try to get information from Sin's man Fairyman who considers himself the biggest lover in town.
Kok is a bored valet driver who spends most of his day dreaming about the beautiful bikini-clad woman whose picture he has taped up to his office wall. One day, a major crime boss keels over dead in the brothel run by his mother. Trying to keep the whole thing quiet before the guy's underling return to pick him up, Kok's mother stuffs the corpse into the box and stashes it in Kok's parking lot. When the thugs put the squeeze on mom, she claims that she dumped the corpse in the harbor, which inevitably leads to even more hilarious complications.