Nobita's complaint isn't philosophical, it's the complaint of a real kid who just wants somewhere that's his. The movie takes that literally, sends everyone backwards in time to find unclaimed land, and turns it into a story about why you don't actually want to be alone. By the end, a prehistoric tribe matters more than any piece of real estate ever could.
Nobita's latest escape plan hits a snag: there's nowhere left to run away to. Every piece of land on Earth belongs to someone. When his friends discover the same problem, even Doraemon agrees they need a solution. The gang decides their only option is to travel back in time to an era before humans carved up the world, back when the planet was truly wild and unclaimed. What starts as a quest for freedom becomes something far larger. In prehistoric times, they encounter a young boy and his tribe facing extinction from a terrifying threat: Gigazombie, a massive creature terrorizing their survival. Despite being from different eras, Nobita and his friends recognize that this tribe's struggle mirrors their own need for a safe place to call home. The movie balances comedy with genuine stakes as the modern kids use their knowledge and Doraemon's gadgets to help people who have nothing but each other. It's a story about belonging that reaches across millennia, wrapped in adventure and heart.