Fifteen years ago, a lost little girl was saved by a boy who shouldn't have existed — and left with a debt neither of them understood yet.Now a university lecturer building a careful, guarded life, Lara doesn't expect her newest student to unravel everything she's spent years protecting. Alexander Kane doesn't expect the woman assigned to tutor him through his secret second life to be the one thing his instincts have been searching for all along.He is the Alpha of a world she doesn't know exists. She is the human he was never supposed to want. Between hidden identities, old debts, and a bond neither of them chose, they'll have to decide if two different worlds can survive becoming one — and if love is strong enough to make forever a promise instead of a risk.