一艘外星飞船坠毁在沙漠中一个与世隔绝的小镇上。它被保护的内容被破坏,释放出一种潜伏的寄生虫,攻击包括人类在内的所有生物的大脑,使它们迷失方向,不自然地变得强壮。In a remote town in the Australian outback, a mysterious object crashes to Earth. When a human comes in contact with the object, that person becomes lifeless and deformed. These changed humans seem interested in the town's children and kill those remaining humans who stand in their way. The town's Sheriff and her deputy, along with a schoolteacher and a scientist, all try to keep as many children safe as possible and understand what is happening to the town. Ultimately, the Sheriff and her team of citizens are helped by an otherworldly force to contain the epidemic.