The only way Mongul can regain the crown of War World is to fight Superman again--and win. So he dispatches the bounty hunter Lobo to Earth to bring the Man of Steel back. After Lobo finds Superman and fights him to a standstill, he tells Superman he has hidden a thermonuclear device on Earth and will turn the planet to dust unless Superman goes with him. To the confusion of the Justice League, Superman accompanies Lobo on an interstellar law-breaking spree. But Superman has a plan. Superman always has a plan.