The hereditary nobleman Vladimir Svetlinsky is unfairly accused of murdering his own wife. Unemployed actress Sofya Nevzorova undertakes to save him from prison. There is a whole list of suspects. How can we get the truth out of them? What if you try the miracle of repentance? Sophia appears to one of the suspects, Nadezhda Veryaschaya, at night dressed as an angel. And it’s okay that the cap with the hole treacherously slides down onto his forehead and his dusty wings dangle on his word of honor. But the fluffy slippers sparkle with virgin whiteness and the voice in the night sounds convincingly muffled. And now the child of vice, trembling with fear and reverence, earnestly repents of all conceivable sins. And that’s all Sophia needs... But the harlot turns out to be innocent, and the investigation continues...