Leung Po-chi directs and Sammo Hung produces this grim horror flick about a school field trip gone horribly horribly wrong. Mr. Cheung (John Sham Kin-fun) takes a half-dozen high school students for a two-day outing on a remote island. Soon after they are dropped off, they realize that the supposedly deserted island is inhabited by three raving hillbillies and their paranoid mother. Though the two parties at first fashion an uneasy truce of sorts, mayhem ensues when one of the loonies decides to make a captive of one of Mr. Cheung's female students, for breeding purposes. With no way off the island and their boat not scheduled to return for two days, Mr. Cheung and his charges are forced to hunker down and defend themselves.