In a battle along the outskirts of time, the secrets of the Speed Force have been revealed! The new archnemesis of those who ride the lightning is coming for Iris Allen. And the Barry Allen you knew is gone forever...or is he? What change does Wally West face? What destiny will Kid Flash choose? Prepare to meet a Flash Family that's both familiar and different...and get to the starting line for the next epic adventures of the Speed Force!