The Daywalker known as "Blade" - a half-vampire, half-mortal man - becomes the protector of humanity against an underground army of vampires.

A rare mutation has occurred within the vampire community - The Reaper. A vampire so consumed with an insatiable bloodlust that they prey on vampires as well as humans, transforming victims who are unlucky enough to survive into Reapers themselves. Blade is asked by the Vampire Nation for his help in preventing a nightmare plague that would wipe out both humans and vampires.

For years, Blade has fought against the vampires in the cover of the night. But now, after falling into the crosshairs of the FBI, he is forced out into the daylight, where he is driven to join forces with a clan of human vampire hunters he never knew existed—The Nightstalkers. Together with Abigail and Hannibal, two deftly trained Nightstalkers, Blade follows a trail of blood to the ancient creature that is also hunting him—the original vampire, Dracula.