Treasures of the Khan's headquarters

It is forty days since the bandits in General Vorontsov’s apartment shot his old friend, KGB Colonel Alexander Lukov. Vorontsov invites senior investigator Volin to the wake and gives him another notebook of Zagorsky’s memories to read.
The commander of the... Separate Corps of Gendarmes, Lieutenant General Tolmachev, acting as an old acquaintance, asks Zagorsky to help investigate a strange case related to archaeological excavations.
The Baltic German Baron Roman von Storn went with an expedition to Tsaritsynsky district, to the village of Rozumikhino. During excavations, the Estonian Magnus Saar who worked for him disappears. Later, scraps of his bloody clothes are found on the shore of a local forest lake. The gendarme investigator Persephone, who arrived to investigate the case, also disappears without a trace after some time...