 It has been many years since the "flood of light" in which the entire world sunk underwater. What few people remain live on an island that floats in the sky. One day an earthquake rocks the island and a cave opens. Four young explorers enter the cave and find a crystal: the crystal tells them that they are chosen ones, Light Warriors... The game follows the Light Warriors as they explore their own world, and eventually cause the old world to emerge from the depths. They are the world s last line of defense against an onslaught of darkness which threatens to consume the world.