Irene Miller is assigned to do a story on sabotage at the Sterling Steel Mill. Alan Scott tags along as the Green Lantern and discovers that the man responsible, calling himself "The Leader," is the Sterling Steel Mill stockholders' representative, who wanted to drive down the price of the stock to buy it for himself.; Blinded by a mobster's bomb, Dr. McNider gives up the practice of medicine to write articles for crime magazines. But a chance accident, with an owl crashing through the former doctor's window during the night, allows McNider to discover that he can see in the dark [as well as in the daylight with special infra-red goggles he creates], so he decides to adopt the secret identity of Dr. Mid-Nite to round up "Killer" and bring him to justice for his crimes.; Al and Mary witness some criminals escaping from the Police, and Mary follows them in her own car. But when the crooks have a flat tire, they kidnap Mary and escape in her car.; Hop Harrigan becomes a costumed hero.