Jessie lies about inviting a date to the Chamberlain Family Christmas Olympics to prevent her family from canceling the event. She meets Bryan on a dating app and he agrees to spend the holiday with her and her family, where they participate in eccentric activities and develop real feelings for each other.

Twas the Date Before Christmas
Jessie creates a fictional plan, announcing she'll attend the "Chamberlain Family Christmas Olympics" with a date to ensure the event's continuation.