"Death of the Speed Force" begins! With renewed resolve following the events of "The Flash Year One," the Flash is back with a new mission, a new outlook and a brand-new speedster HQ. But the Fastest Man Alive is slowing down-and there's only one explanation: the Speed Force is dying. Plus, the Year of the Villain heats up as Captain Cold uses Lex Luthor's offer to boost Heat Wave to the next level!