Since she died, everything about Sarah's life has been difficult and complicated. Every day brings splitting headaches and memories that aren't her own. Every night brings dreams of the same otherworldly cave and a blood-red tree.

And now, it seems she can revive the dead.

Sarah regains a sliver of comfort after she meets Alex, a centuries-old vampire who's as much a misfit in his world as she is in hers. They find solace in each other as their deathless worlds intertwine. Their bond grows even tighter after Alex experiences Sarah's unusual effect on him. When Sarah is discovered by the unscrupulous Society of Keepers, she's tempted by a unique role that requires an extraordinary balancing act. As she tests her abilities, Sarah grapples with the ghosts of Alex's past and accidentally jeopardizes his delicate freedom from a rigid and controlling vampire world.