In the midst of the Crisis on Infinite Earths, police scientist Marlon Wells is struck by lightning and splashed by chemicals in a scene eerily reminiscent of the origin story of an old comic-book hero, the Flash. After being astonished to learn he also possesses the same super-speed as his hero, Marlon realizes he must use his powers for good. But with the world on the brink of annihilation, what can even a Speed Demon do?
A group of super-villains from three different worlds converges on Earth-S on a quest for a piece of the Rock of Eternity itself! As Shazam’s Squadron of Justice and the Marvel Family take on these villains in individual skirmishes, will the real goal become evident in time for the heroes to stop them?