Secure within a desolate home as an unnatural threat terrorizes the world, a man has established a tenuous domestic order with his wife and son. Then a desperate young family arrives seeking refuge.

A troubled college freshman, Luke, suffers a violent family trauma. He then resurrects his charismatic childhood imaginary friend Daniel to help him cope, not realizing how dangerous Daniel is.

It centers on Val who finds herself and her young children held hostage by Denny when he forces his way into her house after committing murder that day.