A chronicle of decades of neglect by state and federal agencies, allowing the Grace Corporation to reap millions in profits from the largest vermiculite mine in the world while knowingly exposing generations of Montana residents to fatal levels of asbestos-contaminated dust. One in every 40 residents of the valley has died from or suffers from illnesses related to asbestos and many more cases are still expected to surface. Libby’s story, which culminates in the criminal trial of the corporation’s executives, is here told in all its shocking detail.