When six former friends are invited to a winter wedding in Canada, the last thing they want is a reunion. Bride-to-be Bryn is desperate, so much so that she's funding their travel—but there's a surprise in store: She bought them nonrefundable tickets for the cross-Canada Christmas train. For four days they will be trapped together in a cozy train cabin, travelling through snow-topped mountains and over frozen lakes during the most magical time of year. It's a trip like no other, and Bryn hopes it will end their feud just in time for the wedding. But interactions on board are tense. Then a snowstorm hits and stops the train. Will the six make it to the wedding, and will it be together?