In the not so distant future the world of Kaligula is under threat from a species of bio-enhanced Vampires dubbed the "Depraved" these mix of machine and bloodsucker reek havoc on the innocent humans across the world, just when all hope seems lost a mysterious and secret organization of female soldiers called The Order of The Six arrives to combat the threat, these soldiers also possess mysterious supernatural powers which allow them to combat the threat of the Depraved.

The story follows the adventures of one of these soldiers called Scarlet as she attempts to save the world from the threat of the Depraved in the process she will uncover the secrets behind the origins of the Depraved and the origins of her own past where all is not as it seems...