Private investigator Drongo does not usually take on such cases. If things go missing in the house of a major businessman, this is the concern of the local police officer, not an intellectual detective. But the murder of a businessman is no longer a joke. Surveillance cameras installed in the house recorded a woman wearing a raincoat worn by the murdered man's wife. In addition to her, Drongo has several other suspicious women. To identify the killer, the detective needs to find out some details of the businessman’s complex family life. But how to do this if all the suspects contradict each other?..