After the U.S. is ravaged by ecological disasters, Maya Roberts, a young herbalist, must travel in the hazardous high desert to find healing plants for her community, which has been stricken by some new, fatal illness. There, she encounters a remarkably peculiar Navajo named Howling Sky, who is able to trigger rare phenomena-impossible occurrences. But is Howling Sky a man-or a ghost? Can Maya come to terms with the dangers implicit in a despoiled...