
Oscar Raebone, a keen tax avoidance investigator for the Inland Revenue, is sent to look into the affairs of a company making novelties. He finds a strange group there calling themselves 'The Tycoons'.
An Earthman on a solo tour of duty on one of Jupiter's moons buys a Martian woman as a companion. He mistreats her, assuming her to be just a 'dumb Martian'. He learns, to his cost, that she has more intelligence than he gives her credit for.
Psychiatrist John Frame is asked by police to examine Michael Connor, who claims to have come from another time. Frame is startled when Connor demonstrates an extraordinary and intimate knowledge of Frame's private life.