In the Moscow Marriott Aurora hotel, the vice president of a reputable bank brutally murdered one of his employees. At first glance, it is a completely unmotivated murder, especially since the accused refuses to testify. And yet, expert analyst Drongo finds out that the reason for the crime is jealousy: the banker suspected his wife of infidelity. But it was not possible to “promote” this version - the banker’s wife was strangled in the car. And when an important witness was pushed down a flight of stairs, Drongo realized that the killer was following in his footsteps and was ready to do anything...