A "Spark" is giving people all over the world super-human powers. The only people who seem to be missing out are the former core members of the Justice League, who have no memory of their real lives. Superman remembers first, and turns the others on, one at a time. They now have to stop the rampant growth of the superhuman population to save the Earth. In defeating their enemy, they learn they are a great team, and decide to form a new Justice League.