At the opera, the Superman imposter sneaks from booth to booth, swiping people's jewelry without them noticing. When one woman cries out in alarm, Lois leaves her seat and walks out into the hallway, confronting the imposter. After a brief struggle, Lois rips the "S" patch off the imposter's chest, and he runs away. Not having seen his face in the darkness, Lois is convinced that Superman has really been responsible for all the crimes. As Lois calls the police, Clark exits the booth to follow after the imposter.

Cracking the door open slightly on the roof and noticing the imposter, Clark says, "My double is in for some trouble." Seeing the police cars gather on the street below, the imposter heads back toward the door to the stairwell, where he is confronted by the real Superman. The imposter fires several rounds at Superman, to no avail. He claims his Boss made him do it. Without noticing, the imposter reaches the edge of the rooftop and falls over the edge. Superman swoops down to save him just in time. In the glow of the search lights, Lois and the police realize that the real Superman is not the criminal.

Hoping for a lighter punishment, the imposter agrees to take Superman to his boss. Superman, without saying a thing, stands in front of the boss' desk. After several moments, the boss tries to hit him with a golf club, then raises a lamp and sees Superman's face, prompting him to press a hidden button that opens a trap door and sends Superman falling into a pit. After the trap door closes, the boss and the imposter push the desk over the door and hide in a vault. Superman breaks out and opens the vault, tearing out electrified bars, only to find that the two have used a welding torch to cut a hole in the wall and escape. A police car is headed around a bend, unknowing that the criminals are coming at them from the other side. Just in time, Superman steps in and stops the cars from crashing, and he leaves the two criminals for the police to handle.