The story begins with Arthur Curry, now ruling as Aquaman, navigating the delicate balance between Atlantis and the surface world. However, this fragile peace is disrupted when strange tremors spread across the ocean, signaling the awakening of an ancient threat. At the heart of this turmoil is Atlan, the first king of Atlantis, resurrected by the sorceress Nereida. Atlan, driven by a thirst for revenge, seeks to reclaim the throne and bring the Seven Seas under his control, threatening not only Atlantis, but the entire surface world.Armed with the legendary Trident of the Deep, Atlan possesses the power to manipulate the ocean’s power, capable of triggering catastrophic tsunamis and earthquakes. As these disasters begin to unfold, Arthur teams up with Mera, Orm (Ocean Master), and his wise advisor Vulko to trace the origins of these disturbances and find a way to stop Atlan before he brings both worlds to their knees. Their journey takes them to ancient underwater kingdoms, confronting mythical creatures and hidden dangers as they race against time to prevent all-out war.