Award-winning author Nevada Barr is a perennial New York Times best-seller whose immensely popular Anna Pigeon series delights mystery fans around the world. This time, just married Anna is bound for Rocky Mountain National Park and a new post as Park Ranger. But no sooner does she arrive that she finds herself involved in the vanishing case of three young girls. When two of the girls suddenly reappear claiming to know nothing of the whereabouts of the third, Anna begins to suspect an evil presence lurking within the tranquil mountain sanctuary.