A group of young adults spend the weekend at a friend's house by the lake. Joined by the local sheriff, the group encounters an escaped convict Native American chief, a copycat killer and the return of the terrifying masked stalker, Damon.。过去若有怪兽从环太平洋现身,都会有专为击退牠们而造的巨大机甲猎人奋力反抗。但好景不常,如今澳洲遭到怪兽肆虐,全洲人类被迫疏散。泰勒和海莉这对年幼的兄妹不幸走失,著急地寻找不见踪影的父母,过程中,两人学会操控一个废弃许久的破烂机甲猎人,因而有了突破眼前难关,杀出一线生机的希望。。