The fair is visiting Aidensfield and caravan site owner Edna Plummer uses it as a meeting place for her criminal brother, who receives some stolen paintings that have been transported from Holland, and one of the paintings falls into the hands of Greengrass, who attempts to get himself out of trouble by offloading them to Dr Ferrenby. However, Ferrenby forces him to tell Nick what is going on, and the unlikely pair join forces to nail Edna and her smuggler associates. Meanwhile, Kate is put in a difficult predicament when one of her patients tells her that her son may be connected to the disappearance of two children.