The Mercy Falls Children’s Hospital is about to close its doors for good. But the closing process is taking longer than expected; a railroad accident has left the local hospitals without beds.

Amy (Calista Flockhart), a young nurse, is sent to help out. But the children are nervous. And afraid. Because this hospital holds a secret. Something terrifying that has returned from the past.

To discover it and protect the kids, Amy must face up to everything: the rest of the hospital staff who refuse to accept the obvious, her own fears, and the truth.