Now that Ivan is about to turn 21, he is now grown up and finally old enough to marry the beautiful Vasilisa. But when Vasilisa is kidnapped and trapped in modern Moscow, Ivan and his friends must travel to the present day to rescue her.

The plot takes place in 1942-1943, during the defense of Stalingrad. The Jew Viktor Strum is a talented nuclear physicist working in one of the country's institutes on the creation of an atomic bomb. At this time, Strum's relatives die in Nazi camps and NKVD dungeons, and persecution begins against him. The inventor can only be saved by his scientific brainchild, which Stalin himself became interested in. The state needs such a powerful weapon as an atomic bomb. The scientist has to make a choice: to remain faithful to science and work for the "leader of the nation" or to abandon his vocation and be destroyed.

根据布尔加科夫同名小说“改编”。