Sargon the Sorcerer has apparently killed Flash.Picture News reporter, Iris West, convinces her husband, police forensics scientist, Barry Allen, to take a vacation. Allen, as the Flash, uses his Cosmic Treadmill to travel to the 23rd Century. Returning seconds later, the Flash seems noticeably well-rested. Then he collapses. West gets the Flash, as Allen, to a hospital. Allen slips into a coma, leaving the doctors baffled as to the cause of his condition. Meanwhile, in the 25th Century, Eobard Thawne, the notorious Professor Zoom, sits in his cell, watching old gangster movies. Thawne is contacted by Sargon The Sorcerer, and offered a chance at escape. Sargon draws Thawne back in time, to the 20th Century.After handing Thawne his Reverse-Flash costume, Sargon reveals that, after spending the last two decades fighting crime, he wishes to pursue a more villainous path. Sargon asks Professor Zoom to reveal the secrets of time travel to him. Professor Zoom refuses, and races away at...