Captain Crox, the formidable pirate of the Universe, and his young friends Andrei and Lavissa more than once had to engage in deadly battle with space villains. So this time the dictator Purk captured the planet Demeter. His goal is to unleash a new Galactic War and establish control over the Universe. Captain Crox and his team disguise their ship "Star Wanderer" as a civilian ship and, entering the orbit of Demeter, penetrate the residential perimeter of the planet...