Your Christmas or Mine?

At a London train station, Hayley (Cora Kirk) and James (Asa Butterfield) say goodbye for Christmas, then each decide to swap trains and surprise the other. They pass on the platform without noticing, and end up spending the holiday with each other's families. Jim O'Hanlon keeps the camera close on both households, so the awkward dinners and family habits get as much room as the couple.