Private detective Tatyana Ivanova was given a problem that her colleague Sherlock Holmes once struggled with. Respectable businessman Vdovin receives notes with children's drawings, which at first glance contain nothing special: human figures, a house, a car, trees. All the fun will begin when Vdovin’s car disappears, the house is set on fire, people from the businessman’s circle are hunted, and he himself is put under investigation for something he did not do. One consolation is that the mysteries of the dancing men, it turns out, can be solved not only on Baker Street...