The family of disgraced official Hale Lane is exiled to the water-starved Feiyi region. His daughter Wren Lane uses blueprints to unearth an aqueduct, solving their water crisis. They build Waystation Haven, becoming self-sustaining. Local unscrupulous merchants maliciously frame the station. Wren Lane collects evidence, undergoes inspections, and proves her innocence. She defends the water source and waystation, opening a stable grain supply route.