A cop behind bars—and undercover at that—especially a hulking guy with fists as heavy as a pood like Jean-Claude—means there’s going to be a brawl.
It’s no coincidence that Officer Bark ends up in prison posing as an inmate: someone has to find out who killed the nine prisoners here—all in the exact same way. And while he’s at it, he’ll restore order among the prison population by teaching them a thing or two about boxing and karate.