Meet Paradox: a new time-traveling villain with a tragic backstory who poses a big threat and carries a big grudge against the Flash. With the Flash about to be erased from time and space, the only person who can help him defeat this foe...is 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? Collects The Flash #88, The Flash #751-755, The Flash Annual #3, and the lead story from issue #750!