"Before he was Aquaman, Arthur Curry was King of Atlantis. But the superstitious Atlanteans, with their hatred of the surface-dwellers, could not love a king who was half human. Arthur left Atlantis the moment he joined the Justice League, relinquishing rule to his half-brother Orm, the Ocean Master. Ever since, the world below the waters has maintained an uneasy peace with the world above. Until now. While Earth's superheroes are distracted elsewhere, a mysterious force is pushing Atlantis and the surface world to the brink of war. Casualties rise and a full-scale invasion seems increasingly likely, until only the Justice League can prevent a bloody confrontation that would doom half of civilization to a watery grave."--Page 4 of cover.