A powerful crimelord is being transported to his trial in an armored vehicle. At the same time, a small crew of thieves is preparing to rob a warehouse. When the prisoner's gang comes for him, the surviving cops who are guarding him have to take cover in the same warehouse. Now, the cops and the crooks have to work together to save themselves from a faceless army of well-armed gangsters.
It's Assault on Precinct 13 all over again, only it's in French. The movie keeps up a good pace, even if it doesn't always make a hell of a lot of sense, and the violence is pretty cool.