Life in the Special Forces can be too much for some people to bear. Yes, it is a life of action and adventure, but it's also a life of constant fear and secrecy, where the risk of death waits around every corner. For other people, that life is their calling, and the surge of adrenaline is as addictive as any drug.
Vesper is one such addict, a young man ready to sacrifice everything to serve his country. He joins a secret unit of the International Security Agency, where he is given a new life, a new identity, and a new mission: control the renegade threat without letting the general public discover that it exists.
The renegades are not merely men fighting for a cause, though. They are vampires, vicious blood-drinkers who choose to live by their own violent code rather than following the rules of their more civilized brethren, the Nighters.
The renegades are growing at a dangerous rate, and developing ever more brutal methods to harvest the fresh human blood they crave. Vesper is faced with a difficult choice: as a human, he is not strong enough to stand against the renegades. Should he sacrifice everything and become a Nighter, in the name of the greater good?