Two strangers who both happen to be in marketing, share a room at a bed-and-breakfast when a snowstorm strands their flight in Montana on Christmas Eve.

While searching through her late mothers attic, Rebecca uncovers sealed cards from a mysterious suitor that had been addressed to her widowed Mom over the past 12 Christmases. As she begins to wonder the identity of man, Rebecca hires a handsome, yet mysterious, detective to help solve the mystery behind the letters.