In this exciting collection of new Chuggington adventures, Koko is thrilled to be spending the day training with Daley, Chuggington's new express delivery engine. Together they pick up and deliver important packages all around Chuggington, frequenting the bustling docks where Skipper Stu, Chuggington's new Dock Master, is unloading and loading the ship. Through their adventures, Koko and Skipper Stu learn the importance of patience, paying careful attention to detail and, of course, teamwork as they commence with the Delivery Dash at the Docks!