Plant workers and firefighters put their lives on the line to control a catastrophic April 1986 explosion at a Soviet nuclear power plant.

Nuclear physicist Ulana Khomyuk fears that a second explosion could devastate the continent.

Lyudmilla Ignatenko ignores warnings about her firefighter husband's contamination.

Ulana Khomyuk faces government hurdles in determining the truth about the cause of the explosion.

Valery, Boris and Ulana risk their lives and reputations to expose the truth about Chernobyl.