Synopsis by Bruce Eder
Johnny Sims, a two-bit burglar and sneak-thief, breaks into the apartment of Clark Kent (George Reeves) and chances upon the secret closet where he keeps his Superman costume (Kent isn't wearing it that night because he must take a check-up as part of an office insurance program). He steals the costume but manages to get shot by a pursuing police officer and makes his way to the apartment of Ace (Dan Seymour) and Connie (Veda Ann Borg), a pair of low-level criminals. The burglar dies, but not before he gives Ace the location of the apartment where he got the costume. Ace is skeptical but the notion that this is Superman's costume, and what it would mean if he could figure out Superman's secret identity, is too tempting to ignore. Meanwhile, Kent is almost panic-stricken over the loss of the costume and what it might mean if someone discovered his secret. He can't go to the police, so he calls in a friend, private detective Candy Meyers (Frank Jenks), who is understandably bewildered when he is asked to help Kent recover a stolen piece of property, but also informed that he can't be told what the property is. While he's following up on the prints left behind by the burglar, Ace and Connie are several steps ahead -- when they learn that Kent is a reporter for the Daily Planet, they know they're on the right track. But due to a misunderstanding, they think that Candy is Kent and kidnap the detective. Kent must save his friend and bring an end to this situation, and to do it he is forced to bring Ace and Connie to a remote mountain peak, to an isolated cabin, until he can figure out what to do about them. It's then that the pair make a disastrous decision about trying to escape.