Unable to defeat the hulking juggernaut Doomsday, Superman devised a way to defeat his greatest enemy by trapping him at the end of time. But now the invincible monster that once killed Superman has escaped his prison and returned to Earth to exact revenge against the Man of Steel. With the Justice League decimated and defeated at the feet of Doomsday, Superman must forsake a promise to save the infant son of his oldest friend and go into a battle that he knows he is destined to lose.