Professional baseball players disappear in front of the spectators during a short power outage in the middle of a match.

Nambu thinks that it's Galactor's fault and according to his instructions, the Science Ninja Team are keeping guard everywhere in the baseball stadium. During another game, a similar power outage happens, and the players disappear before their eyes again. This time however, Jinpei, who was acting as a ball boy on the field, has disappeared as well.

The remaining four team members go to investigate the ground thoroughly in the middle of the night. But suddenly the surface of the earth breaks open and Ken and Jun fall into a secret subterranean base. They are made to inhale some gas and are taken into a cell. Jinpei is already in the cell. He says that the players are brainwashed by some kind of drug and are to receive a special training in order to turn them into Galactor members. The three of them escape from the cell. Katse tells them that during the match this evening under the floodlight, a hydrogen bomb might explode. It would be capable of blowing away the whole country. Then he escapes. Ken contacts Nambu. Joe and Ryu start to search immediately for the bomb on the surface, but the game has already begun.

Ken gets information from the commander that if a homerun ball hits the backscreen, the fuse will be activated. A homerunball is hit. Joe and the others aim at the ball flying towards the backscreen. All four weapons miss their aim. However, the ball is knocked away just before hitting the backscreen. The ball falls to the ground and it is pierced by Ken's boomerang.