In the apartment belonging to Ekaterina Ryzhova, the corpse of the brutally murdered Mikhail Vershinin is found. Ekaterina claims that she never saw him, and she rented out the apartment to a completely different man. Investigator Sedov has every reason to doubt her words, because at some point Katya accidentally drops the phrase that Vershinin was a rare scumbag. However, it soon becomes clear that many people had reasons to kill Vershinin... But, in addition to searching for the killer, Sedov has to deal with personal affairs - his wife ran away from him with another man, and not just anywhere, but to Paris...