Christmas comes to the haunted household of Button House in this festive special, and Alison and Mike prepare to host a family Christmas for the first time. Alison finds her phantom housemates less than filled with festive cheer, and learns that Christmas is never easy when you're dead. Mike comes up with a dubious plan to get his parents into the holiday spirit, while Julian is confronted by a new arrival, who forces him to relive memories of his life and come to terms with his past misdeeds.
Alison and Mike are trying to find a semi-harmonious routine with the ghostly housemates of Button House. The ghosts have found a way to make their new situation work for them, while the couple are working towards a new money-making venture.