Night Unbound — Dianne Duvall

For centuries, Lisette d'Alençon has been a warrior against the dark. She fights alongside her brothers and comrades. But when the dreams start coming, she can't bear to confess them to the Immortal Guardians' command. Dreams of a dark-haired man with soft eyes and brutal wounds, a man her heart aches for--and a man she knows has been declared a traitor.

Zach is an exile, a loner. He won't defend himself against false accusation or grovel to those who should have faith in him. But he'll damn sure defend the woman who kept him sane against a plague of supervamps that seems to have appeared from nowhere. The Guardians will blame him, and that will make Lisette suspect, too. With life, death and eternity on the line, who can they really trust?