Twelve-year-old Haven Jacobs can't stop thinking about the climate crisis. When Haven's social studies teacher urges her to find a way to make a difference to the planet, Haven focuses on the science class project at Belmont River, where her class will take samples of the water. When Haven and her classmates get to the river, there is ample evidence of pollution. The only thing that's changed by the river is the opening of Gemba, the new factory where Haven's dad works. She's determined to expose Gemba and force them to clean up their act. But when it becomes clear taking action might put her dad's job in jeopardy, Haven must decide how far she's willing to go.