When Finn, the love of Melanie's life, inexplicably dumps her at his sister's engagement party, Melanie is determined to put the past behind her and move on. Just months later Finn shows up with an unexpected proposal: will she come home with him for Christmas, to a charming cottage in the Scottish Highlands, and pretend to his family that they're still together - just for the season? Mel agrees to fake-date him - with one condition. She gets to publicly dump him at the end of the week. But with Finn's mother set on making this Christmas picture-perfect, can Mel and Finn keep up the act without falling back into old feelings? As their white lie snowballs out of control, and the ice between Mel and Finn begins to thaw, Mel must decide if she really wants this to be just for the season...