Melanie hasn't had a good year. Finn, the man she was sure was the love of her life, dumped her. In front of everyone. At his sister's engagement party. So when Finn shows up at Mel's doorstep, her first instinct is to slam the door in his face. But he has a proposal for her: Spend the week of Christmas with him and his family in a vacation cottage in the Scottish Highlands and pretend they're back together. Mel agrees - on one condition: At the end of the week, Finn will allow Mel to publicly dump him so he can experience the same humiliation she felt. Except as the festivities bring her closer than ever to Finn and his family, Mel starts to lose track of which feelings are fake and which are for real.