An alien child is evacuated from his dying world and sent to Earth to live among humans. His peace is threatened when other survivors of his home planet invade Earth.
Batman is manipulated by Lex Luthor to fear Superman. Superman´s existence is meanwhile dividing the world and he is framed for murder during an international crisis. The heroes clash and force the neutral Wonder Woman to reemerge.
Determined to ensure that Superman's ultimate sacrifice wasn't in vain, Bruce Wayne recruits a team of metahumans to protect the world from an approaching threat of catastrophic proportions.