In the remote frontier of a country devastated by war, Ren survives by hunting, farming, trading, and forgetting the contours of what was once a normal life. Then an army unit, led by a young female soldier, comes to the mountains on government orders in search of a legendary creature called the rain heron: a mythical, dangerous, form-shifting bird with the ability to change the weather. Ren insists that the bird is simply a story, yet the soldier...