When Lena's younger sister Fressa is found dead, their whole Viking clan mourns--but it is Lena alone who never recovers. Fressa is the sister that should've lived, and Lena cannot rest until she knows exactly what killed Fressa and why--and how to bring her back. She strikes a dark deal with Hela, the Norse goddess of death, and begins a new double life to save her sister. But as Lena gets closer to bringing Fressa back, she dredges up dangerous...