In the aftermath of a tragic accident that killed their son, Rachel and Anthony decide to move to the other side of the world and focus on their surviving twin son Elliot. What begins as a time of healing and isolation in the Scandinavian countryside turns into a desperate battle for the very soul of their child, as an entity claiming to be his dead twin brother takes over Elliot - setting Rachel on a diabolical journey to unravel the horrible truth about his twin. —Rotten Tomatoes