Two days after the explosion, the world wakes up to a terrifying global disaster. At the power plant, helicopter pilots try to put out a fire in the reactor core, braving plumes of highly radioactive smoke. Soviet authorities eventually begin to evacuate 50,000 people from the local area, while still trying to conceal the scale of the accident.

14 months after the disaster, plant operators face a Soviet show trial. At the reactor, scientists hunt for the deadly remains of the radioactive fuel. As the USSR crumbles, an independent investigation reveals the true cause of the accident, and the full scale of the cover up. 40 years later, the nuclear exclusion zone turns into a war zone.