Before her death, a grandmother gives her granddaughter a magical ring that'll give her dead spirit power over her. The spirit manifests itself when her head detaches from her body at night and flies away with guts dangling under it, seeking blood to drink or raw flesh to devour.
This movie is about Bang Rajan village. This village is located north of Ayutthaya, the old capital of Siam, predecessor state to modern Thailand. The village played a famous role related to its resistance against the Burmese in the war that saw the destruction of Ayutthaya city in 1767. Tap is a Siamese soldier leader. Siamese people have internal conflicts while they are also fighting with Burma.