The story takes place in the underwater world of Mer. The army of the kingdom of Bars, until recently peaceful, begins a terrible war against its neighbors: the principality of Moslem and the ancient and glorious kingdom of Agadia. No one can explain how the small kingdom of Bars has reached such a power. In a short time, it manages to challenge much larger and more powerful realms. Meanwhile, two young 'spiritual knights' (Jo and Oz) make a living by killing marine monsters. The population, however, is not very tolerant towards the duo. People fear their powers, seeing them as a potential threat. The pair will unwillingly find themselves fighting the army of Bars, and the forces of darkness that have taken its head...

The story takes place in the underwater world of Mer. The army of the kingdom of Bars, until recently peaceful, begins a terrible war against its neighbors: the principality of Moslem and the ancient and glorious kingdom of Agadia. No one can explain how the small kingdom of Bars has reached such a power. In a short time, it manages to challenge much larger and more powerful realms. Meanwhile, two young 'spiritual knights' (Jo and Oz) make a living by killing marine monsters. The population, however, is not very tolerant towards the duo. People fear their powers, seeing them as a potential threat. The pair will unwillingly find themselves fighting the army of Bars, and the forces of darkness that have taken its head...