Private detective Tatyana Ivanova is hired by Eleonora Brutskaya, who wants to understand where her infantile son Pavel got the big money. Having followed the object, the detective finds out: Pavel works in a nightclub and provides some services to rich elderly ladies. Just like that, simple and unpretentious! Ivanova is about to close the case, but Pavel is killed. All this happens in front of Tatyana; she sees a yellow Jaguar leaving the crime scene. It turns out that the car belongs to the daughter of a local businessman, Nastya Kolesnikova. However, here the trail ends: the girl, as it turns out, was kidnapped the other day and is now demanding a ransom for her...