When Khan Kluay is born, his grandmother notes that his back is "gently sloped like a banana stalk ... I suppose that is what I should name you". "Khan kluay" is Thai for "banana stalk".
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. Khan Kluay serves as the personal war elephant of the king.
In battle, Khan Kluay meets a giant Burmese war elephant with fiery eyes that was responsible for the death of Khan Kluay's father, and Khan Kluay gets a chance to acquit himself in battle for the glory of the Siamese kingdom, and take revenge.