On a pitch-black Oklahoma highway in November 1974, a 28-year-old mother drove with a Manila folder of documents that could dismantle a nuclear corporation. Karen Silkwood never reached her destination, and that folder of explosive proof vanished forever, becoming the focal point of one of the most debated mysteries of the 20th century.

A brilliant chemistry student turned plutonium plant technician, Silkwood documented safety violations, falsified weld x-rays, and missing plutonium. After being contaminated far above legal limits under suspicious circumstances, she died in a car crash that investigators and her union fiercely disputed, leaving behind a legacy that reshaped corporate accountability.

• Her path from bankruptcy and hardship to a plutonium fabrication plant
• The Washington meeting that revealed the deadly mecha ...