Cyclops and nymph

These crimes occurred in the city of Bronnitsy with a difference of one and a half hundred years ...
In the old days, an acute saber deprived the life of beautiful lovers - Melania and Makar, the Baryn and its serf actor ... The double murder is investigated by the world mediator Alexander Pushkin, the son of the poet, and his friend Claudius Mamontov. Nowadays, Savva Psaltyrnikov, a large official who managed to make a huge fortune, build an estate, purchase real estate and open accounts, from the poison. And not having time to transfer all this to his son ... At the request of the police chief, the secret investigation is conducted by Ekaterina Petrovskaya, the criminal observer of the press center of the Central Internal Affairs Directorate, and Claudius Mamontov, a descendant of the same landowner and complete namesake.
What moved criminals - self -interest, revenge, passion? And is there a connection between modern poisoning and the murder of one and a half century ago?