Glyphosate began as a Monsanto patent, sold worldwide under the brand name Roundup, and became the most widely used herbicide on the planet. The film traces internal company documents released during litigation, showing what Monsanto scientists and executives knew about the chemical's health risks and when they knew it. Farmers and former employees describe daily exposure to the spray, while lawyers and plaintiffs who developed non-Hodgkin lymphoma after years of Roundup use lay out the case that became the basis for billion-dollar jury verdicts against the company. Regulators at the EPA come under scrutiny for their reliance on industry-funded studies, and internal emails surfaced in discovery suggest company scientists ghostwrote research later presented as independent. The film moves between courtroom testimony, archival Monsanto marketing that promised Roundup was safe enough to drink, and interviews with toxicologists who dispute that claim. It builds a plain, document-driven case about a chemical still sprayed on food crops around the world.