Created to attack Black Adam and his family, the Four Horsemen - Death, War, Famine and Pestilence - were robots designed by the mad scientists of Oolong Island, using the dread technology of Apokolips.Believed destroyed in Black Adam's murderous rampage which claimed the lives of thousands, the four horsemen have in fact survived - and aim to wipe out all life on Earth. Can Superman, Batman, Wonder Woman and the villains and mad scientists still living on Oolong Island put aside their differences to combat their terrible threat?