It’s not without reason that they say that for detectives there are neither weekdays nor holidays. So the owner of a prestigious restaurant, and part-time amateur detective Larisa Kotova, gets down to business this time on International Women's Day. She is investigating the murder of the owner of a real estate company, Nikolai Golovanov, who was poisoned at his dacha... Larisa rejects one suspect after another and then suddenly realizes that she has overlooked one important circumstance - the theft of a pistol from Golovanov's office. But such disappearances, as her experience as a detective suggests, usually entail very sad consequences. This means, Larisa decides, it is necessary to find Golovanov’s killer as soon as possible, because until she finds out who committed the first crime, she will not be able to prevent the subsequent one...