The story arc features one of Superman's encounters with the Legion of Super-Heroes as adults, and foreshadows several plot twists which occur in the years that follow.
Upon reaching Legion Headquarters, he walks through a hall of statues honoring deceased Legionnaires, including Ferro Lad, Chemical King, Reflecto, and Shadow Woman.
In another hall devoted to married Legionnaires, he observes statues of several wedded members: Shrinking Violet and Ord Qelu (the former Duplicate Boy), Saturn Woman and Lightning Man, Light Lady and Timber Wolf, and Night Woman and Cosmic Man.
After capturing the culprit, the Legionnaires learn that he is Douglas Nolan, Ferro Lad's twin brother, who was controlled by Legion of Super-Villains member Saturn Queen.
They reveal themselves to be descendants of Lex Luthor and Mr. Mxyzptlk, two of Superman’s greatest enemies, and are unanimously voted into the team.