The underwater realm of Mer sets the stage for this conflict. Bars, once a peaceful fishing enclave, now fields an army of leviathans and mermen. Its sudden aggression against the principality of Moslem, a pearl trade hub, and Agadia shocks all. No scholar can explain how Bars, a modest outpost, has amassed such power; its rapid rise challenges the established order. Meanwhile, Jo and Oz—young spiritual knights sworn to protect the sea—earn a living by hunting colossal krakens and serpentine predators. Yet villagers whisper that their mystic talents may threaten the fragile balance of power, fearing they could unleash forces beyond control. In a twist of fate, the pair is compelled to confront Bars" army and the shadowy entities that have seized its leadership.