As a young elephant, Khan Kluay is taunted by the other elephants because he is fatherless. Naturally, Khan Kluay is curious about his father, and he's told that his father is a war elephant for the king. Because of this, he wants to find his father. As he was still a young elephant, he wanders off to begin his search, and he is soon captured by a Burmese raiding party. In trying to escape from the Burmese camp, the young elephant is befriended by a Siamese boy prince, Naresuan, who has been ransomed to the Burmese. Naresuan has the ability to calm Khan Kluay into thinking clearly, and Khan Kluay makes his escape.
A local warlord comes around annually to collect taxes from the village, and his taxes have become greedier and heavier each year. The village rebels, and with the humans and their elephants working together, the warlord and his beasts are defeated.
In battle, Khan Kluay confronts Nguangdaeng, a giant Burmese war elephant with fiery eyes, who was responsible for the death of his father. He gets a chance to acquit himself in battle for the glory of Siam, and his revenge.
Finally, Khan Kluay avenges for his father by killing Nguangdaeng. After that, he is released to spend the rest of his life with his loved ones until the Burmese return.