A Science Fiction story from 1960, Irvin Webb is the skipper on the Xanthus, a small space freighter who is a suspect in the death of Singleton, one of his crewmates. His other crewmate, Jimmy Cross, is in jail on suspicion of committing murder. Naturally, the insurance company, Interworld Insurance Company, was reluctant to pay Webb, the beneficiary of the life insurance policy on Singleton so they send Kate Bristol, to discover whether Webb was really guilty. So, Kate finagles with Webb to charter a space trip on his ship so she can figure out whether he really was guilty or not. Webb is a cantankerous, profane character who was reluctant to have her along, but she pays the exorbitant sum he demands for the trip (secretly financed by the insurance company), and Webb, being greedy, gives in. He also takes on a cargo to be delivered to the Tombaugh Station on Pluto. He dislikes having Kate along and tries to ditch her on Titan, a moon of Saturn, where there is a space station, but Kate manages to stay on board. So, on to the Tombaugh Station and the rest of the story, where she will discover what really happened to Singleton.