Peterburg, 1829 god. Gorod potriasaet chereda samoubiistv i neschastnykh sluchaev: zastrelilsia graf Ukhtomskii, poruchik Repetin slomal sebe sheiu, upav s loshadi, a barona Baumgartena nashli v petle. Politciia vse spisyvaet na sluchainoe stechenie obstoiatelstv, no sudebnyi vrach, Ilia Andreevich Tonner, inogo mneniia. Emu udaetsia vyiasnit kraine interesnuiu detal: v etom dele zameshana dama, che litco skryto pod vualiu. Tonner uveren, chto dame izvestny mnogie tainy, v tom chisle i zagadki proizoshedshikh ubiistvвÐ"¦