Three generations of crime-fighters join together for the greater good: Sentinel, Wildcat, the Flash, Black Canary, Starman, Sand, Hourman, Atom Smasher, the Star-Spangled Kid and Hawkgirl. The heroes of the present and legends of the past come together to form the Justice Society of America! They have been called upon to save one of their own from one of the darkest powers ever to walk this earth…