All three branches of Justice League International are gathered together, for a major world crisis has arisen - natural disasters and portents of doom abound. When the entire world is rocked in an earthquake, Booster Gold recognises what is happening - the coming of the Overmaster and both his and the League's greatest victory. Captain Atom leads a group of the most powerful Leaguers in a strike against the Overmaster, but Ice is won over to his cause and Booster is horrifically injured by Devastator of the Overmaster's new Cadre.