Gong Wei-hua, a second-generation immigrant entomologist from China, and Aramura Kiichi, an amateur Japanese photographer, meet in Taiping Mountain, Yilan, in their common search for the Dream Butterfly. Eventually, the two meet a faceless butterfly hunter and the three become fellow travelers. Gradually, after several strange events, the butterfly hunter reveals his experience of the White Terror. But will what happens in the forest stay in the forest? Did someone hear them?