On the asteroid Belt, between Mars and Jupiter, the richest and most prosperous amusement park in the solar system has been built. In the last month, ten spaceships have mysteriously exploded in the area and Sereya Arsey, daughter of John Arsey of the aerospace tourism company "Peace". The Rangers, despite their initial reluctance, decide to take the case. Released on a mission, the heroes are attacked by a squadron of mysterious jets which are immediately shot down but the survivors lead Izaac and the others directly to the enemy's base. Kid and Omachi break into the installation and clean up the guards and defense systems. Inside the base the two find the disintegrator beam that terrorized the spaceships. The president of the installation company confesses his sins but is liquidated by the underworld families of Jupiter who intervene with shuttles but are swept away by Bryger. The threat of the destroyer beam has been eliminated but the underworld is still operational.