The Black Diamond of Sonya Golden Hand

The black diamond "Noir De La Roche" — "The Black Cliff" — was stolen from a prince who arrived in Moscow from Central Africa in the 19th century. The precious stone was stolen by his translator servant, with whom the... nobleman traveled across Russia. The swindler was not brought to trial in time, but his dead body was found. The diamond disappeared without a trace but soon ended up with the infamous thief Sonya Golden Hand… Investigator Sergey Dulo arrived at a restaurant for a meeting with the famous lawyer Susanna Milkina, but suddenly an explosion rocked the luxurious hall… Milkina died, and Sergey miraculously survived and actively participated in the investigation of the explosion. Unsightly episodes from Susanna's past were uncovered, one of which involved the murder of a famous actress, a star of Soviet cinema, and the theft of her priceless black diamond…