Melanie has not had a good year. Things are definitely not going as planned in her work life, her best friend has moved to the other side of the world, and her favorite bagel shop is closing down. But the real reason this year has been awful is because Finn, the man who 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 her doorstep two weeks before Christmas asking if she'll help him, her first instinct is to slam the door in his face--or punch him. But he has a proposal for her.

Finn wants Melanie to spend the week of Christmas with him. He has to face the holiday at a vacation cottage in the Scottish Highlands with his two perfect siblings who are happily paired off with their perfect partners. His mother is obsessed with the idea of a perfect Christmas--and to try and help, Finn may have told his mother he and Mel are dating again. All she has to do is come with him and pretend they're back together.

Melanie may hate Finn, but she loves his mom. And with her own parents on a trip, it looks like the only way to spend the holiday with someone she cares about is to suffer through being around the person she despises most.

So Melanie agrees--on one condition. At the end of the week, Finn will allow Mel to publicly dump him--in front of his family--so she can get her dignity back and he can experience the same humiliation she felt.

As they embark on seven days with Finn's family, Mel tells herself it's only a week. She just has to pretend to still be in love with him. Until she starts to lose track of which feelings are fake, and which are for real...