The simple and kind-hearted young man Ajin (played by Tony Jaa) grew up in a primitive jungle in Thailand since he was a child. The villagers worked from sunrise to sunset and lived a peaceful and quiet life. They used elephants as a means of transportation and assistants, and established a deep friendship between people and animals. Ajin's father was a royal guard. In his spare time, he taught his son to learn Muay Thai so that he could enter the palace to defend the king one day. The father carefully raised the elephant and asked the village chief to present the elephant to the king on the day of Songkran. Unexpectedly, the village chief plotted against the law and sold the elephant to the gang in an attempt to sell it to Australia for huge profits. They did whatever it took and injured Ajin's father. The angry young man broke into the gang's lair alone and fought a big battle with this group of lawless criminals. When he learned that the elephant was being sent to Sydney, Ajin did not hesitate to go alone, thus embarking on a road full of death and danger...