"Six years ago, the legend of Batman emerged amid the greatest catastrophe Gotham had ever endured. A maniac calling himself The Riddler shut down all electric power mere days before a terrifying superstorm. But the Dark Knight isn't the only hero to surface during this moment in time known only as the ZERO YEAR! Journey back to the Zero Year to see the early tales of heroes and heroines such as Nightwing, Green Arrow, Batgirl, Superman, Birds of Prey, Catwoman and more!"-- Provided by publisher.