The plot of Ong Bak 2 revolves around Tien (Jaa), the son of Lord Sihadecho, a murdered nobleman in ancient Thailand. As a spirited and unyielding youth, Tien resists savage slave traders and, moments from death, is rescued by a man known as Cher Nung. Cher Nung is a renowned warrior and leader of the Pha Beek Krut, a group of pirates/guerilla fighters, and Cher Nung realizes unsurpassed physical potential in the young Tien and takes Tien under his wing. The Pha Beek Krut are a group of expert martial artists of various styles from all over Asia, and Tien is trained to unify these different styles of martial arts, and grows into the most dangerous man alive. As Tien becomes a young man he goes on a lone mission of vengeance against the vicious slave traders who enslaved him as a youth, and also the treacherous warlord who murdered his father, Lord Rajasena, who has an entire army protecting him.