Xia, a demonic sorceress, has sworn to destroy Queen Ma'at and her kingdom of Abelar. As Xia and her army of vampires terrorize the land, the queen dispatches Princess Tanis to find Oda, the one man who can stop Xia. He is a cold-blooded mercenary who is revealed to be Tanis's biological father. Joined by a thieving rogue named Aedan, Tanis begins a danger-filled quest that pits her against the sister she never knew, a half-human, half- vampire creature determined to kill Oda.