After a brush with a strange substance, an average fireman transforms into something far greater than himself — the Mercury Man. Endowed with fantastic superpowers, he will now use his abilities to help conquer the forces of evil.

Seki, a young Japanese detective has lost his workmate whom was killed by a serial killer. This weird killer enjoys killing a particular type of person - transsexuals. When the killer escapes to Thailand, Seki follows and meets Lily, a cabaret showgirl who her best friend was murdered by the same killer.

Based on the real life story of Parinya Charoenphol, a Muaythai boxer who underwent a sex change operation to become a woman.