The Night Haunters

Danielle wakes up in a hospital, and some weird things are happening to her. She craves blood. And to make things weirder, the guy who made her this way is back, and wants her to join a society of vampire assassins. What will she uncover about her past, her bloodline, and herself when she is swept into this group down the road? Suck at summaries, but it's worth a look! AU, plz R&R!