The Eleventh Doctor, Amy Pond and Rory Williams are drawn to a house in a village where all of the villagers have been abducted by aliens, the Sceadu. All that is, except one, a man who lives alone and all year celebrates Christmas with a house and garden full of seasonal lights. The Sceadu are made of anti-photons and can exist only in the dark. While the house remains lighted, they are all safe.