In Atami, the mysterious disappearance of surfers and the sudden appearance of a gigantic sea lifeform causes a commotion. An investigation is launched by oceanographer Nobuko Nanami and the SV2 team, who — by coincidence — happened to be there on vacation. The Mayor gloats as more tourists come to Atami in the hopes of seeing a confrontation between a Labor and the monster. Further complicating matters are a prophet who claims to be a “Venusian” and a one-eyed scientist. As the odd cast of characters gather together, will a giant monster really appear!?

The giant monster reveals itself at last, and proceeds to burn the town of Atami! But, in truth, this is all part of the Mayor’s scheme of economic revival…

As the authorities’ evil scheme threatens Oceanographer Nanami, SV2 sits on the sidelines in uncertainty. There is also a rather dubious movie director, who may or may not know the source of the escalating monster crisis. As the Self-Defense Forces are dispatched, the Ingram’s Revolver Cannon fires, and the truth of the giant monster will become clear!