When the little buses encounter Anne, a woman consumed by dinosaur mysteries, they get swept into an unexpected expedition. Anne is the mother of Hana the Mechanic, and Hana is unhappy that her mother still cannot let go of dinosaurs and their history. Anne sets off anyway to find the dinosaurs, and this time she brings the little buses along with her. The special is the latest adventure-genre entry in the Tayo Adventure Series, following the buses' farewell to Tino.