Living on the edge of war, Celeste is thrust into battles waged by powerful spiritual forces that seek to undermine the foundations of her world. With blood that allows her to directly engage these veiled enemies, she finds herself reaching into the depths of both light and dark to protect humanity from what they are forbidden to see. With the aid of her Guardian Angel and the shadowy vampire from the great plains, she must fight her way through to the future or risk everything that clings desperately to the essence of life.