When Caroline and Francis receive an offer to house swap, they jump at the chance for a week away from home. After the difficulties of the past few years, they've worked hard to rebuild their marriage for their son's sake; now they want to reconnect as a couple. On arrival, they find a house that is stark and sinister in its emptiness - it's hard to imagine what kind of person lives here. Then, gradually, Caroline begins to uncover some signs of life - signs of her life ...