The unbridled avarice of a giant pharmaceutical company destroys the centuries old balance between human kind and an immmortal race.
Temlor/Levin Pharmaceutical, known as TLP in the drug industry, is a multi-billion dollar company on the brink of failure. Its three remaining highly successful medications are coming off patent in under two years, and the company's leaders have nothing to replace them. Profits are bound to plummit.
All hopes are invested in TLP's clandestine "New Species Procurement" or NSP division.
The dangerously ambitious Carla Addison, NSP director, and the division's two cryptozoologists, Marcus Theren and Franco Barrientos establish operations in Barcelona, Spain endeavoring to capture a species from which TLP will synthesize a new super anticoagulant drug.
When the three capture two of these preternatural beings, they attract the attention of Dalziel Botham, a founding member of the Keltori – an ancient order of immortals whose doctrines have for centuries allowed their race to thrive alongside humans without provoking them into a worldwide hunting and killing of all his kind.
When trials for the new drug cause the transformation of trial participants into a plague race of rogue blood drinkers, Dalziel, and Boston Police detective Nolan O’Conner combine their skills to neutralize these accidental monsters, and trace the cause to those responsible.