Laura and Callum have met exactly three times—once at a mutual friend's wedding (Laura doesn't remember), once at a baby shower (Callum doesn't remember) and once right now—when Laura lets herself into his flat to find him exiting the shower completely naked (they both remember).
When Callum's parents walk in and mistake Laura for his mystery girlfriend, Laura has no choice but to play along, accepting their invitation to spend Christmas at home in the Scottish Highlands. But then Laura's best friends show up pretending to be her family, and Callum's ex is invited, and as Laura gets closer to Callum, she can't tell if the increasingly sizzling chemistry between them is real or just a very convincing part of the act...
