Hyuma joined the glorious giant army. However, while he was happy, he revealed his fatal weakness, the lightness of the ball, and was demoted to the second army. In his humiliating farm life, he finally completes the changing ball "Big League Ball No. 1". And whereabouts of the confrontation with his fateful rival, Mitsuru Hanagata, Toyosaku Samon ...

Nobita and Doraemon venture to the Heavy Smokers Forest in the Congo, where they find a stray dog and a giant statue. After discovering that they are wanted for trespassing on isolated kingdom land, Nobita and the rest must utilize the power of the mysterious statue to prove their worth.