In the Tin Hotel, all rooms and all services are available to Doraemon and his friends, they only have one prohibition: they cannot enter in the basement room. While they are enjoying the hotel and the incredible range of activities it has, Doraemon is attacked and kidnapped. Wise Gallio, the hotel owner, explains that it is the rebel army of robots led by Dr. Napojistra, which has imprisoned the entire population of the planet Chamocha and convinces them to help you released them and Doraemon.