When Nathan meets Amy, she's in tears. Frustrated that she's not more interested in sex, her boyfriend has left to consider their relationship. Nathan knows he should leave the young woman alone - relationships with a 400-year-old vampire can be hazardous for mortal females. But he can't fight the attraction any more than he can understand it, so he offers to become her sexual tutor and show her how to please her boyfriend. Unable to battle his power of persuasion, Amy agrees.
While Nathan is seducing Amy in ways she's never imagined and showing her things no mortal lover could, she's falling in love with him. When she learns his secret, she's ready to join him in eternity. Haunted by memories of his past, Nathan must find a way to convince Amy that she doesn't belong in the darkness. But can he convince himself to let her go?