Aquaman's investigation into the mysterious Atlantean terrorist attacks on the surface is cut short when Black Manta taps his newfound weapons cache and unleashes an unstoppable weapon upon the undersea kingdom: a relentless behemoth from the deep that lays waste to everything in its path.

Recovering and rebuilding after the "Deluge," Aquaman finds himself locked in a ferocious battle with Warhead, a monster awakened during Atlantis' war with the surface. Then, Deadwater makes an unwelcome return!

Enraged by rumors of Arthur's survival in the slums of Atlantis, the ruthless King Rath orders the use of ancient Atlantean techno-magic to track down the Aquaman at all costs! But the ex-king Arthur can't hide for long when his fate collides with that of a mysterious young woman on the run from Rath's own secret police. Her name: Dolphin.

Arthur joins forces with his new ally Dolphin, his loyal frenemy Vulko and the love of his life, Mera, to rally the underworld of Atlantis and end the reign of the nefarious King Rath! But even as Rath doubles his efforts to destroy "the Aquaman," dangerous new enemies begin to emerge from unexpected places...some vying for the throne themselves!