空に三日月形の島を見つけたのび太は、ドラえもんたちと秘密道具の飛行船で島を探しに行く。色々な時代・場所をめぐり見つけたその島は、誰もがパーフェクトになれる楽園だった。のび太たちは完璧なネコ型ロボット・ソーニャに出会うが、島には秘密があり……
Nobita spots a crescent-shaped island in the sky and goes to find it with Doraemon and his friends using a secret airship. The island he found through various eras and places was a paradise where anyone could become perfect. Nobita and his friends meet Sonya, a perfect cat-like robot, but the island has a secret...
