"Earth-2: Chapter One: Golden Age" continued from Justice Society of America (Vol 3) #17 and continues in Justice Society of America (Vol 3) #18.
*Power Girl has made a life for herself on our world, as a member and chairwoman of the Justice Society of America and as a hero in her own right.
But she's never stopped dreaming of one day returning to her Earth -- the parallel world where the members of the Justice Society were the only heroes. Where her best friend was Helena Wayne, the daughter of Batman. And where evil was a little easier to fight -- wasn't it? As her greatest wish comes true, Power Girl's about to find herself back on Earth-2, surrounded by friends she thought she'd lost forever. *Source: DC Comics.com