For nearly a decade, the Justice League have protected the universe from evil. The world’s greatest superheroes have faced victory after victory. Now at the peak of their success, the League has become a global organisation. For the past year, there has been an uninterrupted period of peace. The world has enjoyed this well-deserved peace, taking it for granted. But Batman, the leader of the Justice League feels there is a greater threat on the horizon and has not stopped preparing for the worst. The League's Justice Day ceremony is interrupted by Starro the Conqueror's invasion. Starro unleashes his mind controlling spores on the planet which separates the heroes and forces them to fight their own people.
