Decades before The Flash was running around, Central City had another protector, The Nightshade. After defeating his greatest enemy, the technological mastermind, The Ghost, he went into retirement. In the present day however, The Ghost has reemerged from suspended animation to wreak havoc in his future world. To stop him, The Flash needs the help of The Nightshade to confront this revitalized menace. In another story, another man has taken the Nightshade identity to conduct his own murderously bloody war on crime while The Flash and the original Nightshade doggedly hunt him down.