After his wedding to Mera, Arthur Curry is officially crowned King of Atlantis. But peace is short-lived. His exiled brother, Orm, Ocean Master, returns with a challenge. Arthur, seeking to avoid civil war, teams with young warrior Garth—Aqualad—to confront Orm. Meanwhile, a new Black Manta emerges, deadlier and more strategic. Arthur discovers this new Manta is Kaldur, son of the original Blac...