When lexcorp accidentally unearths the intergalactic serial killer Doomsday, Superman battles the creature head on in the fight of his life. . .literally. The world collectively mourns their fallen hero; humanity realizes it will never feel safe again. Superman's enemies rejoyce - all but Lex Luthor, who grieves the loss in his own demented manner, setting off a chilling chain of events that even he couldn't foreseen.