Winter Street Inn owner Kelley Quinn and his family are busily preparing for the holiday season. Though the year has brought tragedy, the Quinns have much to celebrate: Kelley has reunited with his first wife Margaret, Kevin and Isabelle have a new baby; and Ava is finally dating a nice guy. But when Kelley's second wife Mitzi shows up on Nantucket, along with Kevin's devious ex-wife Nora and a dangerously irresistible old fling of Ava's, the Inn is suddenly overrun with romantic feuds. With jealousy, passion, and eggnog consumption at an all-time high, it's going to take a Christmas miracle to get everyone through the holidays intact.