In a war between the Kingdom of Elmfurt and the Duchy of Brauha,
the king and queen are captured and killed.
Only princess Ryudomira survives, having escaped to the "Graveyard"
with her palace guards.
However, when monsters attack her guards, Ryudomira is all alone,
and fleeing deep into the Graveyard's maze...
Meanwhile, Lusran has come to the very same maze
as an assassin hired by Elmfurt. Her target is Ryudomira.
In the maze is the Grave Keeper, who realizes that these girls have special
artifacts within their bodies, and lays traps to catch them both.