With the crisis in the Petrification Kingdom resolved, Senkuu and his companions prepare to confront the mastermind behind the petrification phenomenon directly—who is said to reside on the moon. However, the ambitious spaceship project demands immense manpower and critical resources scattered across the globe. Consequently, the Kingdom of Science exploration team embarks on a transcontinental journey aboard the ship Perseus to collect them all. Armed with modern technology and strengthened by new, capable members, the exploration team feels confident about setting sail for their first destination: America. They soon discover that the region is now controlled by adversaries who hold the resources they need, utilizing scientific technology that rivals and even surpasses their own. In a clash of science versus science, Senkuu and his team must outwit their rivals if they hope to ensure the continued survival and rejuvenation of humanity.