For as long as Fei can remember, no one in her village has been able to hear. Rocky terrain and frequent avalanches make it impossible to leave the village, so Fei and her people are at the mercy of a zipline that carries food up the treacherous cliffs from Beiguo, a mysterious faraway kingdom. When her village is suddenly in danger, Fei finds herself on a journey from the peak of her jagged mountain village to the valley of Beiguo, where a startling truth and an unlikely romance will change her life forever.