One thousand years after the collapse of industrial civilization, humanity survives in scattered kingdoms threatened by a vast toxic forest known as the Sea of Corruption. Nausicaä, princess of the peaceful Valley of the Wind, possesses a deep empathy for the creatures of this ecosystem, which other peoples see only as hostile. When tensions between neighboring powers erupt into war, she is drawn into a conflict where ancient technology, political ambition, and environmental destruction become increasingly intertwined. As she seeks to understand the true nature of the forest and the gigantic Ohmu that protect it, Nausicaä struggles to preserve a fragile balance between humanity and a world undergoing profound change.