Cornered by Suneo's bragging about his family ranch, Nobita Nobi claims to own one too. Doraemon's lottery tickets for tiny asteroids save him when Nobita misreads a number and the Anywhere Door opens onto an empty green world between Mars and Jupiter. A wind-up key that brings toys to life wakes his toy horse Pakapoko, and soon Shizuka, Gian and Suneo are animating their own toys and building them a clockwork city. Then an escaped convict stumbles through Nobita's house into the new world.