The dangerous patients at a maximum-security mental hospital break free from their rooms during a power failure, and embark on a grisly murder rampage that's destined to be remembered as one of the worst ever committed. Fifteen years ago, an elusive serial killer known as The Wolf claimed the lives of 15 young girls. Thanks to the work of Detectives Elliott Carbon (John Rhys-Davies) and Johnny Morgan ( Andrew Cymek), The Wolf was eventually captured, locked up, and placed in the care of Dr. Parker (William B. Davis). When the facility loses power and the lights go dark, however, The Wolf and the rest of the inmates seize the opportunity to reclaim their freedom. Now trapped in these winding corridors with a rampaging gang of maniacs, madmen, and murderers, Johnny and Dr. Parker must fight to survive the night, and ensure that no one escapes before order is restored.