Leorex, a 16-year-old, finds himself adrift after a tsunami wrecks his fishing expedition. Alone at sea, he discovers Gladius, a mystical sword, unlocking immense powers within him. As he grapples with these abilities, a malevolent monk seeks Gladius for evil purposes. Leorex encounters mythical creatures and avatars of gods Sud, Han, Shu, Tha, and Kur. His journey takes him through Frigus, the snow island; Lutum, the evergreen island; and Arena, the desert island. Amidst enchanting landscapes and formidable challenges, Leorex must decide if his path leads home or deeper into a world of intertwined destiny and danger, shaping the fate of nations and the balance between light and darkness.