A Guardian's Passion (Guardian #3)

Converted four hundred years ago, Trinity O’Riordan went through the mechanics of life, carrying an extremely painful past with her. Then one night, while hunting renegades, she saved a beautiful girl from a band of vicious vampires and suddenly life didn't look so bleak any more. She wasn't alone any longer and for a while she was blissfully happy. But her past eventually caught up with her and this time Trinity knew she only had this one chance to finally lay it to rest.
Orphaned twice, Gabriella Talos had made the best of a bad situation. She'd risen above all odds to become a well-known and respected expert in her field. She had it made…or so she thought. One night in a dark alley, she was confronted by a past she'd thought she'd successfully buried eighteen years ago.