Nobody knows why a weak kingdom suddenly commands an army that terrifies empires. Two kids hunt monsters in the deep to survive, never suspecting they're already part of the answer. The underwater world feels less like spectacle and more like a place where war happens in the margins, where the real story lives in what nobody's paying attention to yet.
Beneath the ocean's surface lies Mer, a underwater civilization caught between three warring nations. Bars, once a minor kingdom, has mysteriously grown powerful enough to challenge its neighbors Moslem and Agadia, spreading conflict across the deep seas. No one understands the source of this sudden military dominance. Jo and Oz are spiritual knights, young warriors who hunt dangerous marine monsters for survival. Their supernatural abilities make them valuable, but the population treats them with suspicion and fear. Regarded as potential threats rather than heroes, they struggle to find acceptance in a world that needs them but despises what they are. When Bars' aggressive expansion forces conflict into their waters, Jo and Oz reluctantly become soldiers in a war they never wanted to fight. As they confront the kingdom's army, they uncover something darker: a malevolent force controlling Bars from within. The pair must decide whether to survive as outcasts or rise as the unlikely defenders of an underwater world that has rejected them.