In the lush heart of Vietnam’s Cuc Phuong National Park, a young volunteer named Lam discovers that saving a rescued sun bear cub requires more than just medicine and food. When a traumatized cub named Kopi refuses to eat, Lam uses his deep connection to his grandmother’s stories and the rhythmic "songs" of the ancient forest—mimicking bird calls and the rustle of leaves—to stir the cub’s will to...