When the full moon turns red, a mysterious vampire-like Moon Monster with glowing green eyes and considerable kung fu skills chews his victims (usually females) apart. Cops think Donnie Yen did it, so he and some friends join forces with a Cambodian princess (Yang Bao-Lin), fight a small army of henchmen in white suits and machine-guns, and escape close encounters with crocodiles, flesh-eating fish, and some tigers before they find the High Wind Tribe, worshippers of the Monster