Superman travels down into the subway where a tunnel has collapsed. He discovers that a wall was constructed of inferior materials. Farther up the track, he sees someone also inspecting the wall who is beat up by some thugs and thrown into the path of an oncoming train. Superman saves the gentleman. The man tells him that he is City Inspector Hughes, who believes that the Star Company, which built the tunnels, used improper building materials. He also believes that the two thugs were associated with the Star Company.

Superman travels to Star, Inc. and comes across the two thugs who roughed up Inspector Hughes. He threatens their boss by dangling him out the window. As he does so, the two men throw him and the boss out the window. He cushions the boss' fall then grabs him and jumps back up to the window. He makes the boss write out a confession, but the two men have already escaped. He tracks them down, and just as he's about to catch their car, it becomes invisible. But he notices some tracks heading to a deserted shed, and sure enough, inside he feels the outline of an invisible car. As he wonders about this, a trap door opens which drops him into a machinem which encases him in crystal. We discover that Star, Inc. is a company run by the Ultra-Humanite. He reveals that the last time he met up with Superman, he escaped via parachute. As he is talking, however, Superman revives and destroys his crystal prison. He approaches the Ultra-Humanite, who presses a button and drops through the floor. Superman destroys the floor to get at him, but he is unable to find him. He grabs the two thugs, and discovers that the invisible car has disappeared. He turns the two men in to the police, but what of the Ultra-Humanite?

---