Taz is a member of a very successful rogue-hunting team. The rogues she and her teammates hunt include rogue vampires, ghouls, and shapeshifters, among others. Vampires have been legal citizens in the world for 500 years, but they do still have rogues from time to time.
Taz's partners are Ryan Freemont, who is a very strong psychic, and her former police partner, George Raymond Lees. George was killed when he and Taz were attacked by shapeshifters, causing Taz to become a shapeshifter herself. George was killed, but he's come back as a free-roaming ghost.