ISO ships are attacked one after the other by Galactor's black ray. And because Ryu is napping in the God Phoenix, he cannot be mobilized.
Ryu feels responsible and gives Nambu his bracelet back, while shaking off his teammates who want to stop him. He then goes back to the fishing-village where he was born. During this time the fishing areas in the village become polluted through unknown causes. Since Ryu's father is the co-operative head, is blamed by the village people. Ryu tells his father to ask Nambu to analyse the sea water.
In the analysis, a matter is found which results from a process to produce metal. Nambu thinks it's Galactor's deed and arrives in the fishing village with the Science Ninja Team.
Thinking that the sea is strange, Ryu, together with Ken who has been following him, discovers a machine in the water shaped like a ray, which can fly in the sky and dive in the sea. Following it, they discover a base and sneak into it, but end up getting caught. When they succed in barely escaping, Galactor is about to deploy the ray machines to attack the world. The two men lock themselves up in the command room and defeat Galactor by letting water flow into the base, but they wind up getting caught into the base themselves.
Ken reports to Nambu that the destruction of the base has been accomplished by Ryu and requests that he be taken back into active service. The two men, waiting for their death, are rescued by the G4 machine. Back on surface, Ryu gets his bracelet back from Nambu.
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