Jan is a boy growing up in 1930s Siam in a wealthy, dysfunctional family where sex has a huge impact on everyone's lives. Jan is viewed by his father as cursed, since his mother died giving birth to him.

A camera crew travels through Thailand asking villagers to invent the next chapter of an ever-growing story.

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.