Boodworm professor Shiang Chin-Fei (Donnie Yen).  During a picnic celebration, his female students are chewed apart by the moon monster (Ken Lo) that appears when the moon turns red.  At first Chin-fei is a police suspect, but as the corpses mount, the cops realize there are supernatural forces at work.  An archaeologist specializing in esoteric religions, a detective buddy, his ex-wife (now involved with the cop on the case) and the cops all assist in chin-fei’s attempt to clear his name and solve the case.  They travel to Cambodia to visit the Holy Virgin, princess of the High Wind Tribe …