The Poisoner

In Moscow, under mysterious circumstances, Arab oligarch Vilayat Ashrafi, the owner of a powerful construction company, dies. Leading world criminologists have tried to unravel the mystery of his death for several months, but these attempts have been unsuccessful… Vilayat entered his apartment alone, locked himself inside, and almost immediately died. Medical experts determined that the oligarch was poisoned, but by whom, with what, how, and when remains unknown… Ashrafi's partners, having heard about the outstanding abilities of the famous expert-analyst, turn to Drongo with their last hope. However, he is reluctant to take on the investigation — such crimes need to be solved while the trail is hot. But when he is briefed on the case, he changes his mind — everything looks too enticing. However, the assignment turns out to be more dangerous than he thought: the criminal has already prepared a portion of his mysterious poison for anyone who tries to get on his trail…