The story happens in the 18th century England.
The protagonist Miriam is an orphan cursed
by alchemists and whose body is slowly crystallizing.
In an effort to save herself and all humanity,
she must fight her ways through
a demon-filled castle summoned
by her old friend, Gebel.
Suffering from the same curse,
Gebel had become a crystal inside and out,
and no longer has a body made of blood and bone.