Visiting her husband’s family for the holiday season, Charlie sees them struggling to find their festive spirit in the wake of her mother-in-law’s death. She comes up with a well-intentioned plan to bring them all together by noting down a list of rules for them to follow in the lead-up to Christmas, making it look like it was the mother who wrote them. But as her deception unravels, only one thing is certain – there’s nothing like Christmas with the family!