David Blue and his girlfriend Deanne Byrd are ready for a peaceful Labor Day party at his farm in Port Clinton, Ohio. They've invited five of their friends from college to share in the festivities, but events take a strange turn when a freak blizzard descends upon the peaceful Midwestern countryside. Trapped at the farm, unexpected guests soon appear, people definitely not invited. David believes one of the arrivals is actually his doppelgänger -his evil twin-here to destroy David and his friends. But is the doppelgänger real or is David suffering from post-traumatic stress disorder? Can David convince his friends that there really is a doppelgänger in the house, or will they just think him mad? When guests begin to disappear, the tension increases, and no one knows whom to trust. Has David led his friends into a death trap? If so, he is the only person who can save them from his own worst enemy.