In a Moscow hotel “Marriot Aurora,” a vice president of a respectable bank viciously murdered one of his employees. At first glance it’s a completely unmotivated killing—especially since the accused refuses to give testimony. And yet, the expert-analyst Drongo finds that the motive was jealousy: the banker suspected his wife of infidelity. But “unpacking” this version failed—because the banker’s wife was strangled in a car. And when an important witness was pushed into the stairwell landing, Drongo realized the killer is on his trail and is ready for anything…