An ancient
Buddha statue named Ong-Bak is kept in the village of Ban Nong Pradu in rural northeastern
Thailand. The villagers fall in despair after thieves from
Bangkok desecrate the statue Ong-Bak and take the head with them. Ting, a resident and
Muay Thai expert, volunteers to travel to Bangkok to recover the stolen head. Ting's only lead is Don, a drug dealer who attempted to buy an amulet in Nong Pradu earlier. Upon arriving in Bangkok with a bagful of money donated by the village, Ting meets his cousin Humlae, who has dyed his hair blond and begun calling himself "George." Humlae and his friend Muay Lek are street-bike racing hustlers who make a living out of conning
yaba dealers. Reluctant to help Ting, Humlae steals Ting's money and bets it in an underground fighting tournament at a bar on
Khaosan Road. Ting tracks down Humlae and gets his money back after stunning the crowd by knocking out the champion, where his extraordinary skill grabs the attention of Komtuan, a grey-haired crime lord who uses a wheelchair and needs an
electrolarynx to speak. Don is the one who ordered Ong-Bak's head stolen to sell it to Komtuan, who sees no value in it and orders him to dispose of it. The next day, Humlae and Muay Lek are chased all over town by drug dealer Peng and his gang after a botched
baccarat game scam at an illegal street gambling booth. Ting fights off most of the thugs and helps Humlae and Muay Lek escape in exchange for helping him find Don. They return to the bar, where Ting wins the respect of the crowd after defeating three opponents consecutively. The trio find Don's hideout, triggering a lengthy
tuk-tuk chase. The chase ends at a port in the
Chao Phraya River, where Ting discovers Komtuan's cache of stolen Buddha statues submerged underwater. After the statues are recovered by police, Komtuan sends his thugs to kidnap Muay Lek and tells Humlae to ask Ting to fight his bodyguard Saming near the Thai-
Burmese border in exchange for Muay Lek and the Ong-Bak head. Ting is forced to throw the match against the drug-enhanced Saming, and Humlae throws in the towel. After the fight, Komtuan reneges on his promise to release Muay Lek and return the head, where he orders his henchmen to kill the trio. Ting and Humlae subdue the thugs and head to a mountain cave, where Komtuan's men are cutting a giant Buddha statue. Ting defeats the remaining thugs and Saming but is shot by Komtuan, who attempts to destroy the Ong-Bak head with a
sledgehammer. Humlae protects it with his body, taking the brunt of the hammer blows. The giant Buddha statue head suddenly falls, crushing Komtuan to death and critically injuring Humlae. With his dying breath, Humlae gives the Ong-Bak head to Ting and asks him to look after Muay Lek. The head is returned to Ban Nong Pradu. Humlae's ashes, carried by an ordained monk, is brought to the village in a procession on an elephant's back while the villagers, Ting and Muay Lek celebrate the return of Ong Bak's head. ==Cast==