Laney and Leela are identical twins, except for a birthmark and two very different personalities. Home for the summer after college graduation, they go on a camping trip with their two younger siblings. When they return home, they find the town empty. Everyone is missing, including their parents and Laney's boyfriend, Hollister. Besides some strange marks on the ground caused by a lightning storm, there aren't any clues, and without any leads on the disappearances, the police leave the town isolated and closed off. Laney falls into despair, and Leela is not sure how much longer they can remain in their home, hiding from the authorities. When a mysterious man named Curwen arrives, claiming he wants to help them, Laney and Leela aren't sure how to proceed. He decides to tell them the truth even though it is forbidden-he works for the leader of an underground resistance, and he knows where their loved ones have been taken. Curwen offers to help the twins on a mission to rescue their parents and Hollister-a mission that could cost them their lives. Can they trust him? He may be their only hope.