During cleanup at the plant, insiders claim that cost-cutting measures and intimidation tactics create a danger far worse than the accident itself.

In 1979, a plant malfunction causes confusion and a radiation leak. As fear spreads, so does suspicion that the authorities are concealing the truth.

Despite disturbing revelations of wrongdoing at Three Mile Island before and after the accident, the utility fights to bring the plant back online.

Panic strikes the community as a full-blown catastrophe looms. Locals mobilize to confront the authorities and protest the nuclear power industry.