Lover's Knot

One of the most powerful vampires alive has gone missing, which is fine with Dorina Basarab. As a dhampir, her job is killing vampires, not saving them. But then the man sent to find the missing vamp also goes missing, and she finds herself on a rescue with a flood of long forgotten memories playing out in her head. What are they trying to tell her? And can she figure it out before it's too late?