An employee of a private detective agency, Yana Mikhailova, finds her friend Marina in a state of deep prostration. Instead of the former anemone and fashionista, a bore with a lean face and downcast eyes sits in front of her, seriously discussing how to quickly and efficiently divorce her beloved husband and sell her share of the apartment. Naturally, considering all this a temporary whim, Yana advises Marina to see a psychoanalyst. But after her friend is taken away in an unknown direction by a young man who had previously been involved in a murder case, Mikhailova, cursing herself for carelessness, hastily begins an investigation...