Vandal Savage tries to exact vengeance on the retired Justice Society, leading Barry to Earth-2 to help Jay free the other JSA members.Mysterious lights begin appearing in the skies over Washington D.C, Gotham City and Calvin City. All forms of power, from electric lights to motor cars to flashlights, cease to operate in those cities. The city names trigger a childhood memory in police forensics scientist, Barry Allen. Each of the cities in question happen to correspond to the same cities, on Earth 2, that various members of the legendary Justice Society of America call home. Allen decides to call on his Earth 2 counterpart, as the Flash. Vibrating at super-human speed, the Flash attunes his vibratory frequency to that of Earth 2, and arrives in Keystone City, the home of the Golden Age Flash.The Flash heads over to his counterpart's home, and is greeted by Joan Garrick, the wife of the Golden Age Flash. Soon enough, the Golden Age Flash returns home, having just visited the same...