Engines live in the town of Suggington and each of them has their own duties, so life in the city is established, stable and calm. Some transport passengers, others are engaged in the repair of trains and railways, and others deliver goods. However, the length of the roads is small, it is necessary to expand and lengthen. It was decided in Chuggington: Tunnel Adventure to dig a new tunnel. It will significantly shorten the path between settlements and stations. Engineer Tyne has taken on the job, and you will help him bite into the mountain, bypassing dangerous sections that are either impossible to drill or can provoke a collapse in Chuggington: Tunnel Adventure.