When Liz returns home on a college break, her best friend Ashley coaxes her out for a rendezvous with ex-boyfriend Danny at Preston Castle, an abandoned boys correctional institute with a gruesome past. What begins as a dare for the three teens seeking weekend excitement, turns into a grisly nightmare as they try to escape an evil presence still lurking on the terrifying grounds. As they probe the decaying depths and shadows of Preston Castle, they find themselves in deeper and deeper trouble with no way out from the maze of rooms and locked doors. Trapped inside, they’re caught in a horrifying life and death struggle with the unstoppable evil. Will they all survive the night?