The pilot of the Queen of Vega spaceship, Jim Horn, is behind bars on serious charges for the death of the starship and passengers. However, Horn knows for sure that he had nothing to do with it: sabotage was committed on the ship. Having escaped from prison, he begins his own risky investigation, which leads him to the planet Skereth, in the dungeons of which something is being created that will soon make the entire galaxy shudder.