On his inaugural day as the ruler of Atlantis, Aquaman faces a steep learning curve. Fortunately, he is supported by his two trusted advisors: Vulko, the knowledgeable scholar, and Mera, the warrior-princess with the power to manipulate water. As he navigates the challenges posed by deceitful humans from the surface, ancient malevolent forces, and his ambitious half-brother who seeks to usurp the throne, Aquaman must demonstrate to both his people and himself that he is worthy of wielding the trident.