Plant workers and firefighters put their lives on the line to control a catastrophic April 1986 explosion at a Soviet nuclear power plant.
With untold millions at risk, nuclear physicist Ulana Khomyuk makes a desperate attempt to reach Valery Legasov, a leading Soviet nuclear physicist, and warn him about the threat of a second explosion that could devastate the continent.
Lyudmilla Ignatenko, a Pripyat resident, ignores warnings about her firefighter husband's contamination; Valery Legasov lays out a decontamination plan, complete with human risks.
Valery Legasov, Boris Shcherbina and Ulana Khomyuk risk their lives and reputations to expose the truth about Chernobyl.