藤子・F・不二雄先生の遺作（先生自らの脚本作品として）。
のび太は、ドラえもんが22世紀の商店街の福引きでもらってきた小惑星に、おもちゃの町・ねじ巻き都市（シティー）を作ることに。
のび太たちが、順調に都市を作り上げていく中、地球の凶悪犯・熊虎鬼五郎が、どこでもドアを通ってねじ巻き都市にやってきた！
After Suneo bragged about having a ranch, Nobita was asked whether or not he has one, pressuring him to say yes. Doraemon won a number of lotteries for useless planets in the belt between Mars and Jupiter. When Suneo and the rest came to see the ranch, Nobita happened to read the last of the lottery number to the go-anywhere-door, leading them to a huge dreamlike area. As Nobita's toy horse pranced around because of the wind-up life gadget, Suneo and the others became interested in doing the same to their toys and let them live in the area. So they decided to make their own clockwork city.
