Kagaku ninja tai Gatchaman

Galactor's cruise missile crashes and explodes in a fishing village. Its inhabitants have disappeared. Ryu is sent to investigate and saves a girl named Yuka who is pursued by the villagers because they suspect her of arson. Yuka feels love at first sight for Ken, whom she meets because of the investigation. She tries to ensnare him. However, Ken is cold towards her, he does not understand such feelings. Elsewhere, Ryu has fallen in love with Yuka. He has watched everything and tries to comfort her. When she says that she lost a finger ring and that it fell into the sea, Ryu with his pure heart believes her immediately and jumps into the sea in order to search for it. He finds a pearl, and by coincidence, he also finds the cruise missile's memory chip that has sunk at the bottom of the sea. Ryu gives Yuka the pearl and hurries towards his comrades with the memory chip. In the analysis it results that the target of the missile was an observatory.