It's Christmas Eve in the remote Scottish town of Fort William when life is turned upside down for Jen and Rob. Suddenly finding themselves heartbroken, single, betrayed and stranded during a snowstorm, the unlikely pair team up to try and reach home 100 miles away, in time for Christmas. The pair hit the road, but it's not long before the weather turns for the worse forcing them to continue on foot, bickering and bonding as they cross the snowy Moors of Glencoe.