Barry Allen and Eobard Thawne...allies? Can the Flash trust the Reverse-Flash? He may have to, if he's going to stop the massive threat of the brand-new villain Paradox! Meet Paradox: a new time-traveling villain with a tragic backstory who poses a big threat-and carries a big grudge against the Flash. He's determined to destroy the Flash legacy at all costs, and he's powerful enough to do it! With the Flash about to be erased from time and space, only one ally can help him defeat this seemingly insurmountable foe...Eobard Thawne, the Reverse-Flash? Can Barry Allen really trust his greatest enemy? And does he even have a choice? As Paradox accomplishes his mission to make the world see the Flash as a monster, both the Flash and the Reverse-Flash are trapped in a 25th-century Central City that hates everything about the Flash legacy. Can Barry return to his own time and defeat Paradox? Or is too late to undo the damage that's been done?