The protagonist of the series "Bomb" is Ivan Guchkov, a Soviet student at the Physics and Mechanics Institute. He plans to become an engineer and marry his beloved girlfriend Lika, but his life takes an unexpected turn. On the eve of the Great Patriotic War, Ivan's talents are noticed by Major Lobanov, the head of the Intelligence Department. In 1941, Lobanov recruits Ivan and sends him to Nevada, disguised as a secret uranium processing plant. To maintain his cover, Ivan is forced to marry an American woman named Sheila.