One of Khmelyovskaya’s most ironic detective stories. Pan Stefan Palyanovsky is madly in love with Pani Barbara Macheyak. His feelings are mutual, but unfortunately Basen’ka is married, and her husband has no intention of divorcing. To get a divorce, Basen’ka needs a child from Palyanovsky—or at least a certificate proving his existence. But how can she obtain such a document if the husband doesn’t take his eyes off Basen’ka for a single second? Luckily for the lovers, Pan Stefan meets Ioanna on the street—someone who looks like Basen’ka as two drops of water. All that’s needed is something of a trifle: for Ioanna to impersonate Basen’ka for two or three weeks…