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.

Released after 12 years in an asylum, a young woman is reunited with her family and friends but soon begins to realize that the strange and gruesome events that led to her committal may not have been imaginary after all.