Young urban couple Ed and Sarah are set to begin a new life when they move into an isolated Scottish farmhouse.
In bed on their first night, Sarah thinks she can hear noises in the darkness but at first Ed is disbelieving, saying it’s her imagination playing tricks. She persists in her fear, they’re not alone in the house until he agrees to go and investigate.
When he doesn’t return she goes downstairs and is confronted by masked intruders. As she desperately searches for Ed a terrifying game of cat and mouse ensues with the mysterious assailants. But what do they want and what horrors do they have planned for her and her husband?