Jean-Claude Van Damme stars as maverick cop Lou Burke, the only lawman tough enough to go undercover in a prison recently plagued by suspicious deaths. Posing as a prisoner, Burke encounters brutal inmates, corrupt guards, death and betrayal at every turn. But when he unearths the shocking secret behind the penitentiary's inner workings, Burke must attempt a daring escape that pits him against not only hundreds of murderous inmates...but also a deadly enemy from his own past.