A mysterious giant creature called Shindo suddenly engulfs Japan in fear. Though it involved many casualties, they were able to stop it by using a nuclear bomb. However, following the outbreak of Shindo, giant creatures began to appear all over the world. And once again in Japan... Yamato Shidou, a young man who was sent to the battlefield, uses his natural skills to his advantage, but is powerless against the overwhelming threat. Meanwhile, Shinonome of the Special Headquarters for Countermeasures against Giant Creatures approaches Yamato with a proposal. What path will humanity choose to resist the monsters...?