A Prussian princess is chosen to marry the heir to the Russian Throne, but faces plots and intrigues against her.
In 1944 a Soviet marine air force unit stationed near Murmansk is fighting off the German bombers attacking the British navy convoys supplying the Soviet Union with war materials under the lend-lease agreement.
Operatives are looking for a killer who has appropriated someone else's identity. The story of a real case based on the story of Yulian Semyonov.
