The Legion's plan stands revealed. Criminal mastermind Seton Kellogg has devised a means of sabotaging the contra-terrine generating plant that supplies New Chicago with power. Mostly automated, the plant is well-equipped with defenses to prevent exactly this sort of event, but Kellogg's tactical genius and the powers of each member of his lethal fraternity can overcome these, or so he believes. Buck must return to Earth and prevent the Legion from carrying out mass murder. But when he arrives, he discovers them fleeing, having already managed their sabotage...