A story of an actor named Oleg whose wife has been seduced by his neighbor. As he is thoroughly convinced of her infidelity, he would like to poison her. An old man named Prokhorov helps him to get rid of his wife by lecturing about famous deaths caused by poisoning. It is from Prokhorov we learn that many famous and not so famous like Cesare Borgia and Caligula were killed as they were poisoned.
He is known as a Stargazer. But his real name is known to a very limited circle of people - his colleagues in the difficult espionage case. Sergey Chumakov, a young conman, lives in Prague with his girlfriend Lena according to someone else's documents.
The little daughter of the famous pianist Konstantin Zobnin disappears in the city, and then the body of another missing girl is found. At the same time, a successful businessman, obsessed with obsessive desires, seeks help from a talented psychiatrist Alexei, who will be forced to conduct his own investigation in parallel with the official one.
