Saving the sea goddess, Sedna, was just a step on the path. Cajsa's father, the notorious assassin Whisper, knows more than any other about the danger behind the scenes. And he's staying out of it. The flying deer that have plagued the countryside for months have stepped up their game and Calev, Cajsa, and Yue can only imagine why. As the winds blow harder toward their world's demise, can they find the cause behind it? Or will the world as they know it perish?