For 50 years, Uravan, Colorado, was a uranium hub of America. Mining “yellowcake” was at the center of everyday life, where kids played on radioactive tailings and residents used mine waste for garden beds. Then residents started getting sick. Through interviews with historians, health experts, environmentalists, and uranium workers past and present, local documentarian Alec Cowan explores how uranium transformed the American West. As nuclear energy revives the controversial industry today, will the scars of uranium’s past influence the future? Or are some things best left underground?