Stanislaw Strumph-Wojtkiewicz

Jerzy Szajnowicz-Ivanov, the son of a Polish mother and a Russian father, raised in Greece, reports to the Carpathian Brigade in the spring of 1941. While the Poles are wary of him at first, he proves his worth by taking part in several sabotage actions against the Nazis.

Three Polish mathematicians are the first to crack the sophisticated Enigma code used by the Germans just before the Second World War. They build replicas of the Enigma machines and manage to get two of the machines to the British and French code-breakers before the German invasion of Poland in 1939; they ask that recognition be given to their work at the end of the war. After the invasion, the Polish cipher bureau escapes and continues their decoding in Algeria and unoccupied France.