Little did mailman Mick Jolly know that delivering a kitten to an abandoned millhouse would change his life, past, present, and future.Mick Jolly suffers from youngest son syndrome, eclipsed by his popular older brothers. Instead of receiving love letters, he reads his brothers' fan mail on the sly.One dark evening, he drives through a snowstorm to deliver a package, only to find a kitten inside. When Mick returns to the abandoned millhouse with cat food, he encounters a beautiful woman wearing Victorian Christmas clothes.Katherine Gills is waiting for her lover to return. The only problem, she has been waiting for years, maybe hundreds. When Mick comes through her doorway with a bag of cat food, she believes he is the man to deliver her from her endless cycle of Christmas heartbreaks.Together, Katherine and Mick uncover a cache of lost letters, a curse around her family tree, and a budding new romance in a world of past and present Christmases, aided by a kitten who wants to get in from the cold.