Being cut off from the Earth in ancient times, Planet Mamanango is now approaching the ground in 5 million years. One night, a private detective named Pan Shunsaka meets the murder and meets the young investigator Shikishima Kenichi, who has the key to disclosure. Shikisima discovers that the stone from the planet Mamanango generates a huge amount of energy. Making a rocket with an energy stone, Shikisima establishes a research team and goes on the Mamanango Planet. The rocket is heading directly on the Mamanango planet under the command of Shikishima, along with Captain Butamo Makiru, Ayam and Momidzi, who are cabbage created by the captain, rabbit named Mia and Ban Shunsaku. At one time, the rocket lands on the Mamanango planet, where the group finds the "lost world,