A new doctor from Moscow arrives at a provincial mental institution. His interest is the peculiarities of the psyche of a patient who believes that he is Yakov Yurovsky, the man who assassinated the last Russian tsar. In the course of their conversations it transpires that the patient is a kind of philosopher, not without a gift for suggestion. In a while the doctor himself falls under his patient’s influence: he tends to relive that fatal night of June 16-17, 1918 when, without any investigation or trial, Tsar Nicholas II, who had recently abdicated, was murdered, together with his wife, daughters and incurably ill heir. Soon the doctor realizes that the tragedy of the last Russian tsar is in part his own tragedy, too...

In 1921, the Cheka became aware that gold and jewelry were stolen from the treasury of Gokhran, and that a special organization was involved in transporting the stolen to Estonia. Scout Maksim Isayev is sent to this country. He establishes that the cipher of the Soviet embassy Olenetskaya works for the German resident Nolmar, with whom employees of Gokhran Kozlovskaya and an appraiser Yakov Shelekhes are associated. As a result of the provocation, Isayev was arrested. In the prison cell, he finds himself together with the famous Russian writer Nikandrov, who could not find himself in post-revolutionary Russia and went abroad. Released soon by the efforts of his comrades, Isayev continues the struggle for the fate of Nikandrov — for his return to his homeland.

This story starts in 1980 in Paris as the memories of Andrei Borodin, a Soviet agent, take the action back to 1943 during the Teheran meetings of Stalin, Roosevelt and Churchill. A high-ranking Nazi officer developed a plan to assassinate the three world leaders in order to undermine the Allied forces. He commissioned the German agent Max Richard to carry out his plan, but it failed miserably due to the quick action and thinking of Andrei. While in Teheran, Andrei met a French woman, Marie Louni, living in the city and they had a brief but intense affair. Nearly four decades later, the Nazi officer has been captured - but not for long. Freed by terrorists, the officer is hunting down the German agent who failed to carry out the planned assassinations. Max lives at Françoise, a young French woman, who hides him.