It's the perfect Christmas love story.

Margot Murray is a newly single, high-flying businesswoman with no interest in a cutesy seasonal romance.

Ben Gibson is an unlucky-in-love sweetheart in need of a woman to bring home for the holidays.

Together, they make a pact: Margot gets a blissful week away from London in a picture-perfect manner, in exchange for posing as Ben's girlfriend.

The story can only go one way. Margot is sure to fall in love for real.

And she does.

With Ben's sister, Ellie.

What could possibly go wrong?