While possessed by an evil spirit, a man murders his daughter. A police detective investigating the case also becomes possessed. A good monk helps fight the evil spirit.

After his brother was crippled in the ring by a cheating Thai boxer, Chan Hung goes to Thailand to avenge his brother, and finds the key to an omen which may release their family from an ancient curse. He is then caught up in a spiraling web of fate, Buddhist curses, and black magic.