The year is 1943. Beria instructs his deputy Vsevolod Pavlovich Zamyatin to assemble a team of scientists to design the first Soviet atomic bomb. To do this in the midst of a war and on short notice is an almost impossible task. Under Kurchatov's leadership, secret Laboratory No. 2 begins operating in Moscow, employing the best minds from all over the Union.

Kurchatov convinces Zamyatin to include two scientists in the project: the cocky and self-confident Frolov, who had previously discovered spontaneous nuclear fission, and the radiochemist Karpova, who is in exile in Kazakhstan. And although Frolov and Karpova raise questions in the People's Commissariat of Internal Affairs, it was decided to fulfill Kurchatov's request. Actors: Alexey Guskov, Yuri Chursin, Ilya Malakov, Olga Sutulova, Anna Chipovskaya, Alexey Kirsanov, Guram Bablishvili, Ekaterina Klimova, Dmitry Mulyar, Natalia Batrak, Rodion Galyuchenko, Sergey Poghosyan, Oleg Kamenshchikov, Alan Saltykov, Maria Chernolikhova, Dmitry Radonov, Andrew Wynn, Anastasia Shukevich