A group of high school students are abandoned and locked in a classroom after their detention teacher mysteriously disappears. As night approaches, heavy rain and lightning causes a massive power failure throwing the school into total darkness. Strange, haunting images of ghosts begin to appear. When the kids manage to break out of the classroom they find that the old building has taken on a life of its own and is keeping them trapped inside. Will they make it out alive or pay for a horrific event of the past with their lives?