Maggie and Sam are crashing Christmas. When he proposes they team up against his sister's perfect Christmas, neither of them are prepared for the blended family challenges that lie ahead.

Eddie Garrick is a good-hearted man who has turned his back on Christmas due to a traumatic childhood experience. At the request of his wife Allison Garrick, from whom he is separated, Eddie takes his 9-year-old daughter Charlotte to work with him on Christmas Eve, where they meet a mysterious man in a red suit named Nick. Eddie, who is a social worker, thinks the man is delusional and needs professional help, but when he evokes the wrath of a local politician, he and his daughter are taken on a magical adventure that just might restore his faith in Christmas.

Eddie Garrick is a good-hearted man who has lost his belief in the wonder of Christmas. While spending time with his nine-year-old daughter Charlotte on Christmas Eve, he befriends a mysterious man in a red suit named Nick.