A poltergeist is making life hell for a young family. When Charlie Alliss is called in to investigate, he is sceptical. But he gets more than he bargained for - the haunting is a loose thread in a pattern that has sent his partner Maddie to a psychiatric hospital, and involves a force which threatens far greater destruction. Charlie and his friends team up with a ghost hunter, a maverick physicist and the mysterious Yellow Room to eliminate the poltergeist...