With a storyline that shares many similarities to 2001's The Legend of Suriyothai, The King Maker's plot focuses on a Portuguese mercenary (Gary Stretch) in the service of the Siamese court.

Released from his bonds to be put on the auction block, he promptly knocks down his captors and leads them on a chase throughout the ancient city.

Eventually, he is brought under control, but not before he is captured the attention of a Eurasian beauty, Maria, who buys him his freedom back.

It is a multi-national taskforce, not only including Portuguese mercenaries, but also samurai warriors (likely Christians expelled from Japan).

Moments before the queen kills Tong and Fernando in revenge, King Chairacha's brother Maha Chakkraphat arrives.

In an ending text, it is stated that news of these events were heard by the king of Burma, and that the story's impression of disarray is what caused the Burmese invasion and the eventual decline and destruction of Ayutthaya.