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!

Industrial magnate hires the former US Navy Seal Frank Mitchel to find his kidnapped daughter Susan. The only trail leads him to an abandoned factory in Poland. There Frank realizes that it all comes down to more than just a kidnapping.

In 1897, the “Poisoned Knife” clan broke into the royal palace of Thailand to steal the Royal Antiques which the King intended to give to America as a reward for its help in negotiations that avoided Thai territorial cuts. The clan succeeded in stealing the antiques, but the thieves didn’t escape with their lives. Before their deaths, they hid the antiques somewhere close to the palace. During his interrogation, the last bandit chose to end his life by Master Sawang’s sword and let the place where the Royal Antiques were hidden die with him.