少女惠特妮•米勒（Amanda Righetti 饰）及其男友麦克（Nick Mennell 饰）等一行五人前往水晶湖森林游玩，快乐的假期很快为血腥杀戮所取代，躲藏在暗处的杀人魔王杰森（Derek

　　Eight friends, all in a stable relationship, decide to venture into a game of sexual discovery by