Take one depressed sub and a caring Dom. Transport them to fairy-tale castle in the remote Scottish highlands. Throw in a mix of old friends with new problems and you have a Highland Christmas. Master Angus Scott plans a surprise for Jane Scott, who is depressed after her operation. At first she is resentful because she is going to miss her family and the usual Christmas celebrations, but she soon discovers that Master knows best, when unexpected guests arrive to cheer her up. Can Jane forget her own problems and help her friends to solve theirs? Will Master Llewellyn and his friends avert disaster when his children get lost in the woods in a snowstorm? Can Master Prometheus and his pregnant Jenny reach shelter in time?