Tae-sik (starred by YOO Dong-geun) is a petty gangster who hopes to get on easy street. Bonehead (starred by LEE Moon-sik) and Fencer (starred by CHOI Ryung) are his stooges. They happen to get hold of a videotape that contains a conglomerate's president handing an illegal political fund to a corrupt politician. With the detective's ID that comes into their possession, they feel like they own the world. However, as luck has it, the videotape in question disappears.
Tae-sik's gang comes into possession of a detective's ID and decides to play cops. Their abundant field experience on the dark side along with their broad knowledge on the local gangsters make them better cops than real ones. They even receive respect from them. Nothing seems to be in their way. Should they change their jobs?
At the video rental shop, Dong-moo (starred by LEE Sung-jin) happens to acquire the tape in question. Passing themselves off as cops, Tae-sik's gang blackmails Dong-moo to retrieve the tape. However, the tape goes missing, and Dong-moo has no choice but to cooperate with them in their pursuit of the missing tape. But their relationship starts off rocky. Will they be able to retrieve the tape?