If you love a person, love their personal cockroaches, too. Dasha Vasilieva has long lived by this rule—while Marina, Colonel Degtyarev’s wife, does not. This time he went too far with his whims and deeply offended his other half. Dasha tried to reconcile the couple, but a new client of the detective agency Ludmila Kosina got in the way. She asked them to confirm her suspicions about the killer of her sister, Nadezhda Bovary. Doctors said the woman died of a stroke. However, the super-expert hired by Kosina discovered that Bovary had been poisoned by the venom of an exotic caterpillar. And the same poison was found in the cream that the deceased had given on the day before… Nadin’s husband’s first wife—Olga! This is a trivial case—the criminal is almost found. The investigators threw themselves into the work with enthusiasm. And the bigger the shock, the moment they realized they’d been following the wrong lead all along!