A model prisoner's leave ends in tragedy when his past resurfaces, forcing him to flee. He starts over in Thailand, until a local criminal coerces him back into crime. After this man attacks his family, he vows revenge.

A revenge mission becomes a fight to save the world from an ancient threat when superpowered assassin Kai tracks a killer to Bangkok.

The film revolves around the story of Phi - a retired martial artist, longing for a peaceful life with a beautiful wife named Lanh.