Arthur must enlist the help of his half-brother Orm in order to protect Atlantis against Black Manta, who has unleashed a devastating weapon in his obsessive quest to avenge his father's death.

Superman battles against an insurmountable foe named Doomsday.

Arthur Curry learns that he is the heir to the underwater kingdom of Atlantis, and must step forward to lead his people and to be a hero to the world.