Speeding through Central City, Barry Allen is met with a startling sight-the Flash, older, battered, and badly injured. Before he can speak, the doppelganger is gone. Then Barry begins experiencing glitches in his powers-moments that leave him ghostly and immobile in the middle of missions. When a group of his enemies-including Pied Piper, Weather Wizard, and Peekaboo-chooses this time to launch a new assault, the Flash seeks help from his most trusted ally. Oliver Queen - the Arrow.