Wai Shum

A young man wants to be a Hong Kong police officer but is too short to qualify. However, he doesn't let that stop him: he goes around impersonating an officer, investigating crimes, and busting criminals. One day, he interrupts a bank robbery (by three men in drag), gets shot in the process, and dies. When the case is assigned to a female investigator, he returns as a ghost to lend a hand at solving the robbery.

An old school triad tries to accept the fact that their golden age is coming to an end, but it seems they are not willing to go without a fight.