"Two righteous detectives, Skinny and Fatty, infuriate their superior by ruining his wedding"

Skinny Tiger, Fatty Dragon

Fatty and Baldy, a pair of undercover detectives, infiltrate a Triad drug syndicate but are put on a leave of absence after apprehending the kingpin, Tak, in the middle of the police commander's wedding. They return to find that Tak has been bailed out and has hired a team of assassins to exact revenge.