It's Christmas in Aidensfield, and Nick meets two children who have turned to crime to make their ill brother's wish come true. Meanwhile, Ventress and Bellamy attempt to give Blaketon a Christmas to remember by reuniting him with his estranged son. Elsewhere, Kate persuades Greengrass to play Father Christmas for the Christmas concert, but he has bigger worries when he becomes the prime suspect in a spate of Christmas tree thefts.