Under the twin moons and the rule of the great empire, people have been leading peaceful lives albeit unsettling legends about a sleeping princess, dream eating monsters and the falling moons continue to pass around.
No matter how unsettling, people have been seeing these legends as mere stories to scare children, until the day a mysterious plague started spreading and the culprit of the illness seems to be the dream eating monsters. Under the onslaught of these evil forces, a special substance in people's hearts, spiria gets contaminated.
The only thing to counter the monsters is Soma, hidden within the Spire Maze.
All these strives of the land are unknown to the hero, Shing until he rescues a mysterious girl Kohaku from the monsters. Together, the two set off to find the mysterious substance Soma, save the land and find out the truth about the legends.