Continuing from Ong Bak 2's 1440s, Prince Tien fails to revenge his parents' murder by the evil new ruler. The beaten Tien is rescued. Can he bring peace to the kingdom?

Ong Bak 3 picks up where Ong Bak 2 had left off. Tien is captured and almost beaten to death before he is saved and brought back to the Kana Khone villagers. There he is taught meditation and how to deal with his Karma, but very soon his arch rival returns challenging Tien for a final duel.—J.

The cursed Lord Rajasena orders his warriors to beat up on and break the bones of Tien. When Tien is ready to be decapitated, a messenger from King Ayothaya arrives bringing a pardon and Tien is released and transported almost dead to Kana Khone village. Master Bua heals Tien and teaches meditation to help him to resolve the issues of his Karma. While Tien recovers, the evil Bhuti Sangkha defeats Rajasena's soldiers and beheads the king to take his power and treasure. Bhuti self-proclaims king, initiating a kingdom of cruelties. When Tien returns to Kana Khone, he finds the village destroyed and the villagers abducted. Now Tien has to fight against a powerful enemy to release his friends and stop the kingdom of fear of Bhuti Sangkha.—Claudio Carvalho, Rio de Janeiro, Brazil