Synopsis: Barry Allen is nothing if not philanthropic. Helping with a local charity fundraiser, he, as The Flash, vibrates himself at amazing speeds so that he appears to perform "magic" and disappear. When he stops his "trick", though, he finds himself in a different place...altogether.
As he investigates the city he's now in, he finds it's called "Keystone City"--the very same city that was the home of the fictional Jay Garrick he used to read about in comic books.
Taking a chance that his years spent reading All-Star Comics might not have been a total waste of time, he looks up "Garrick, Jay" in the phone book...and discovers he's a real person in this city. When he goes to visit, he notices immediately that it really is the Jay Garrick of the comic books, so he immediately reveals his identity and what he knows of Garrick's origin. Together, they work out that they are from two different Earths, which have very similar, yet distinct, evolutions.
Impressed, the now-retired Garrick decides to enlist Allen's help in solve several crimes plaguing Keystone City. The two Flashes strike out in the direction of The Fiddler, The Shade and The Thinker. They divide the workload and tackle different the different criminals individually.
First tackling The Shade and The Thinker, neither Flash is successful. After their individual defeats, they join forces against The Fiddler. He, though, appears to defeat both of them with one of his musical spells, forcing them to rob jewels for him. When the other two villains arrive on scene to warn The Fiddler that there are now two Flashes, Garrick and Allen suddenly turn on all three villains and overwhelm them. It turns out they've put the jewels they "robbed" in their ears, thus blocking The Fiddler's spell.
Having helped Jay successfully come out of retirement, Barry attempts to go back home by reversing what he did to get to Keystone City. When he's successful, both he and the reader can only imagine what might happen in Jay Garrick's future, and what the rest of this mysterious "alternate" Earth might look like.