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We all wish for the chance to go back in time and change the things. For The Flash, that coveted chance is within reach. He traverses time to right a violent, decades-past crime against his mother, but the ripples of his good intentions prove disastrous, as a fractured, alternate reality now exists in place of the familiar one. Stumbling through this twisted reality where even Superman is nowhere to be found, The Flash seeks the trusted wisdom of Batman, only to find a grittier, more violent Dark Knight in his place. Together, with the help of Cyborg, they race to restore the continuity of Flash's original timeline while this new world is ravaged by a fierce war between Wonder Woman's Amazons and the Atlanteans, led by a battle-hardened Aquaman.