Kat Bloodmayne carries a secret power that has her questioning her own humanity. And every time that power surfaces, it takes another piece of her soul. As Kat searches for a cure to this secret, she crosses paths with a police-inspector-turned-bounty-hunter. Together, they begin to discover that the reason for Kat's power is something all of science can't explain, and will eventually leave her dead... or worse.

Kat Bloodmayne has discovered the origin of her power and escaped her father's experiments, but is no closer to curing the monster she is quickly becoming. Her only hope in finding the doctor who can cure her is bounty hunter Stephen Grey-- the man who betrayed her. In desperation, they traverse the skies and war-torn Austrium... but it may already be too late.