In the 1960s, the Holmesburg Prison in Philadelphia became the site of extensive, confidential medical testing on inmates by major chemical companies. Decades later, the long-term consequences of these experiments, including the use of toxic substances like dioxin, continue to haunt the survivors and their families. This documentary investigates the dark history of these human experiments and the corporate culture of secrecy that allowed them to persist, shedding light on the devastating impact on the lives of those who were used as test subjects.