The senior investigator of the Investigative Committee, Orest Vitalievich Volin, is visited by his girlfriend, Captain of the French Police Irène Belleu, who is also known as Irina Belova. In Moscow, she needs to investigate the case of the murder of a criminal authority from the nineties, now a French businessman, Seregin. Seregin was killed in France, but the traces lead to Russia. Volin and Belova go to General Vorontsov, who may know something about Belova's activities back in the distant nineties. The general offers them to read another memoir by Nestor Zagorsky...
In the spring of 1905, Anna Karpova, the sister of the famous industrialist and philanthropist Savva Timofeevich Morozov, turns to Nestor Zagorsky for help. According to her, her brother is in mortal danger. Zagorsky agrees to help.
