In a lonely mansion in the English countryside, a group of friends gathers for a weekend getaway. What begins as a relaxing retreat quickly transforms into a disturbing experience. After discovering an ancient Ouija board in the attic, the eccentric guests, which include a skeptical novelist, a young adventurer, and a pair of decaying aristocrats, decide to invoke it to see if there is something beyond this world. However, what starts as a joke turns into a dangerous game when inexplicable phenomena begin to occur: flickering lights, doors slamming shut, and terrifying whispers interrupting their conversations.
With each revelation, the group splits between those who believe in the supernatural presence and those who try to rationalize the unexplainable. As the chilling events escalate, tensions among them mount, revealing dark secrets and old rivalries. The atmosphere grows increasingly oppressive and claustrophobic, causing friendship and sanity to be questioned as the night wears on.
To make matters worse, a mysterious visitor arrives at the mansion, bringing with them an aura of fear and despair. The fight for survival becomes a race against time, as the friends must confront not only their own demons but also an evil that seems to have slipped in from beyond. Will they be able to unravel the mystery, or will they become lost souls?