When Corbin Kilwin, microbiologist for the Centers For Disease Control, is called in to help solve a rash of mysterious deaths,he and colleague, Zeke Davis, discover a voracious mutant virus
linking the victims to the killer. Complications arise when bureaucracy and red tape contrive to drive the microorganism to extinction. To save the evidence, the scientists are compelled to
smuggle the dubious microscopic life form out of the laboratory. They learn of a proliferative aberrant genome silently threatening to wipe out the human race by by giving rise to a terrifying
breed of half-human creatures.Bodies drained of blood leave the police stymied, until unsuspecting Kilwin meets a strange young woman who leads him to the trail of the fiendish nocturnal
predator, bringing him face to face with the dreaded reservoir killer.