It is 1911 when the birth of Aviation happens in Siam. Siam is the first country to start an aviation program in Asia. A program to train Thai pilots to fight in World War I by the side of the Allies, but after having several setbacks, will they prove to be qualified enough to go to war as not everyone in Siam believes in it?

Set right before the fall of Thailand's old capital, Ayuttaya, Bang Rajan draws on the legend of a village of fighters who bravely fended off the Burmese armies.