A popular mouse author, Geronimo Stilton, works as an editor and journalist for the fictional newspaper The Rodent’s Gazette in Elisabetta Dami’s animated series. This adventure story is narrated by Geronimo’s sister, Thea Stilton. Bridget, a good friend of Thea Stilton has to come back to Scotland to be of help to her family in carrying out repairs in their old castle. The five mice are ready to help their friend as best as they can. They are shocked when Bridget is kidnapped, and rush to Scotland to find her. During the journey they come across hidden treasures, receive cryptic messages and other surprises and encounter with mysterious events.