A well-known antique dealer in the city is found sitting in his own chair with a frozen smile on his face and a narrow, fatal wound in his chest. Following this, the lifeless body of his friend, the artist, is discovered. And almost the next day, a respectable gentleman and two unfortunate homeless people die in different parts of the city. The only connecting link in the chain of these crimes, which private detective Tatyana Ivanova will have to investigate, is the method of murder and the weapon - an old Spanish stiletto...