Blade: The Series
Krista Starr returns from Iraq to learn that her twin brother, Zack, has died under mysterious circumstances.
Krista soon meets Blade, as well as the killer himself, Marcus Van Sciver, a powerful vampire who becomes smitten with her, turning her into a vampire by injecting her with his blood.
Blade then injects her with the same serum he uses to control his own vampire instincts. Blade offers Krista a chance to help avenge her brother's death and bring down Marcus.
The series is based on the comic-book character Blade and the series of movies featuring him.