Chernobyl tells the story of the explosion that happened at the Nuclear Power Plant that gives its name to the title. In 1986, in Ukraine, the accident decimated dozens of people and turned out to be the biggest nuclear disaster in history. While the world mourned what had happened, scientist Valery Legasov (Jared Harris), physicist Ulana Khomyuk (Emily Watson) and vice-president of the Council of Ministers Boris Shcherbina (Stellan Skarsgรฅrd) try to discover the causes of the accident.