Hayley and James face another challenging family Christmas as they swap holidays with another family. However, due to a mix-up, they end up in different accommodations on opposite ends of a valley. Can their relationship survive the chaos?

Hayley and James, a young couple deeply in love, impulsively decide to surprise each other by swapping trains. Little do they know, they have accidentally swapped Christmases, and now find themselves snowed in with each other's families. As their secrets unravel, they must confront the challenges of the holiday season and see if their love can withstand the unexpected twists and turns.