Chris Huriwai, a young Maori dairy farmer turned activist, sets out to test what New Zealand's dairy industry actually costs the country and the planet. He tours farms, processing operations, and rivers affected by agricultural runoff, sitting down with scientists, farmers, and industry representatives who defend the sector's economic importance. The film lays out the numbers behind New Zealand's reliance on dairy exports, then turns to greenhouse gas emissions, water pollution, and the health claims made about milk, comparing them with data Huriwai finds when he digs into the research himself. His own family's farming background gives the investigation a personal edge rather than an outsider's judgment. The film widens from a local dairy debate into a broader question about food systems, pointing to alternative proteins and land-use changes already underway elsewhere. It closes on the practical choices facing farmers, regulators, and consumers as the industry's environmental accounting gets harder to ignore.