小学生大雄在校园后山发现了一株被遗弃的树苗，它 mysteriously sprouts and transforms into a lively little creature, whom he affectionately names Moku Moku. Intelligent and inquisitive, Moku Moku quickly wins over the hearts of the Wild Bunch gang – Biggie, Little Foot, San-Cha, and Shiang-Shi. One fateful day, while playing in the woods, the gang is sucked into an alien spacecraft. The grave destruction of Earth's ecosystem has caught the attention of a highly intelligent race of plant-based extraterrestrials who plan to kidnap all plants on Earth to save their own kind from extinction. With Earth's oxygen levels plummeting as a result, humanity and all other animals face imminent doom. Can our heroes thwart the aliens' scheme?
Based on the original manga by Shigeru Mizuki, this exhilarating adventure unfolds across galaxies to tackle important environmental issues and remind us of the precious bond between humans and nature.
