A drama that tells the story of the physician and politician MUDr. František Kriegel, the hero of the Prague Spring of 1968, who was arrested and kidnapped to Moscow on the night of August 21st together with five leaders of the party and the state (Dubček, Černík, Smrkovský, Špaček and Šimon). He was the only Czechoslovak politician who managed to stand up to Brezhnev in Moscow captivity, even under the threat of liquidation, and not to sign the Moscow Protovol which meant agreeing to the occupation of Czechoslovakia in 1968.

Lt. Franta Slama is a top pilot in the Czech Air Force who is assigned to train a promising young flier, Karel Vojtisek, and they soon become friends. When Nazi Germany invades Czechoslovakia in 1939, they both reject the authority of their new leaders and escape to England where they join other Czech exiles in the RAF. While flying a mission over England, Karel crash lands and happens upon the farmhouse of Susan, a young woman whose husband is in the Navy. Karel soon falls head over heels for Susan but, while they enjoy a brief fling, in time Susan decides she prefers the company of the older and more worldly Franta. As Franta and Karel struggle to maintain their friendship despite their romantic rivalry.

The story of the film is based on the classical tale about seven naughty sons, whom their mother cursed in anger and thus turned into ravens. When their youngest sister grew up, she decides to find her brothers and to free them. However, she falls in love with a young Prince.