 Lois Lane decides to employ private detective Homer Garrity to find out once and for all if Clark Kent is Superman. At the same time, a blackmailer is trying to kill Garrity, whose life is saved by Superman. Both Garrity and Lois are taken prisoner by the blackmailer. Jimmy Olsen decides to pick up the trail of Lois and Garrity while simultaneously trying to live up to the image of a glamorous private eye. Eventually, the lives of Jimmy, Lois and Garrity are endangered. Clark, in the meantime, picks up the trail. But it will take the powers of Superman to save his friends in time.