Four geologists search for diamonds in the wilderness of Siberia.
During the 1950s Sasha Lvova reminisces about the WW2 years when she fell in love with Soviet fighter pilot Aleksei Astakhov.
The film is based on the conflict between the Monarch of Bulgaria -Tsar Boris III and general Vladimir Zaimov during the Second World War and discusses different understandings about heroism and self-sacrifice.