A new case by the brilliant amateur detective Nadezhda Lebedeva! The loss of a beloved cat is always a tragedy for the owner, but Nadezhda immediately suspected that the red-haired reveler Basic was most likely hiding in a neighboring apartment, which an unsociable girl had recently rented. The cat can be found, but Nadezhda becomes witness to the murder of a neighbor. Call the police? But the next day the neighbor turns out to be alive and well. Maybe Nadezhda is just hallucinating? Maybe she fell asleep and saw the murder in her dream? Or maybe that small fact that the unsociable girl who didn’t like cats suddenly changed dramatically, became nice and found a common language with Basic, says something and there is something serious behind it? Nadezhda understands: this cannot be done without an investigation...