When an American cop witnesses his mentor's murder in a trade deal gone wrong, he finds himself on the wrong side of the law in Thailand. But despite the bounty on his head and pressure to leave the country, he teams up with an ex-military mercenary out to settle a score of his own to bring the killers to justice. Their quest for vengeance brings them face-to-face with a band of notorious

Captured international assassins are locked up inside a high-tech bunker known as the Killing Chamber. To break out of this concrete hell they must duel each other, fight deadly ninjas and battle against gangs of masked maniacs. And... if they survive this, they will have to confront Snakehead: the lethal, deranged top dog who will stop at nothing to kill 'em all!