When a heavily armed madman, Spirited Killer (Panna Rittikrai), attacks a group of adventurers hiking through the jungle of Saidang Region, it's up to one man to stop him. Luckily, he's an expert in Muay Thai, the brutal form of boxing once used to entertain kings. But five years after the lynching of the evil Doctor Duang, this noiseless killer is quite a force. Tony Jaa has a cameo in this actioner from directors Towatchai Ladloy and Rittikrai.