Black Manta was burning with a rage of revenge in his heart, and he was always obsessed with seeking ultimate revenge for his father's death.Now, he holds the legendary black trident in his hand, with unprecedented power, and vows to completely defeat the Aquaman, and pays no cost for this.In order to stop this catastrophe, Aquaman had to go to the person he once was the least likely to seek help - his imprisoned brother Om, the former king who once ruled Atlantis.The two must put aside their past grudges and form an alliance full of contradictions and tensions, and embark on the dangerous path of saving the world, and prevent the destructive storm that is about to sweep the ocean and land.