Jason Gedrick and a small group of Marines are stranded in the remote Afghan desert. But it ain't the Taliban that's worrying them, it's these giant refugees from Tremors. In fact the big worms prove to be an ally of sorts by doing better against the Taliban than themselves but battling these enemies is something not covered in their training.

影片讲述的是两个男孩和一个婴儿的故事。Casey（托马斯·桑斯特 饰）是个14岁的男孩，H（Aaron Taylor 饰）是个18岁的男孩，他们都是被遗弃的孩子。他们在一次偶然的机会下认识彼此，并且捡到了一个同样被遗弃的婴儿。三个孩子之间的故事也慢慢展开……