A mysterious and powerful Speed-Force killer has left a trail of bodies in his wake and only Barry Allen has the power to stop him in these stories from THE FLASH #0-25, plus issue #23.2 (starring Reverse-Flash)! But when the killer stays one step ahead of him, Barry finds himself face to face with the Teen Titans and Kid Flash for the first time. All this will lead to a confrontation with The Flash's most deadly foe, the Reverse-Flash!