Joe sees his parents killed every night in his dreams. An extreme exhaustion is left in his body. A research institute for the Earth's crust, which is located at the bottom of a deep sea canyon 10'000 meters below sea level, breaks off a connection. Ken and Joe go to the research institute in "Marin Saturn" in order to investigate. While going deeper, Joe takes a relaxing nap. As a message from the surface relates information about the existence of a mysterious submarine, Joe hears it, has a nightmare and pulls the cord of the radio set, tearing it to pieces. The submarine is actually from Galactor. The Galactor members have changed into the engineers of the research institute. They go into "Marin Saturn" together with Ken and Joe and, seizing an opportunity, they point their guns at the two. They take the "Marin Saturn" to a carrier and lead the two men into a gas chamber. But Ken sneaks away without much difficulties. He leaves Joe behind since he's not feeling well, as he goes to destroy the carrier. The fuel ignites and an explosion follows. Ken goes to pick up Joe and sees him standing motionless before the flames. Judging that the source of the nightmares is in the light, Ken has Joe face the flames. Joe's memory comes back. He wails that he himself is a child of Galactor. The two men escape by a hair's breadth from the exploding carrier in the "Marin Saturn". On their way home, the two men discover the engineers who were captured in some ghost water and died there. Ken reports this information to Nambu in a message. Joe asks whether Ken does not want to tell Nambu that he's a Galactor himself. Ken answers him: "You're the Science Ninja Team G-2". Standing up on the "Marin Saturn", the two men watch the setting evening sun.