An aging jazz band, led by an old acquaintance of Vernon's, visit Aidensfield to perform at a Christmas concert. Disaster strikes when they are left with a newborn baby after picking up a teenage hitchhiker on her way home to see her parents for the holidays, leaving Rob with the task of bringing two estranged famillies together for Christmas. Meanwhile, Gina takes centre stage at the Christmas concert with her rendition of "Winter Wonderland", whilst a mix-up leaves both Blaketon and David taking on the role of Father Christmas.