The first season of the Russian detective mini-Series «Caesar’s Riddle», which can be watched online in our online cinema starting with either of its two episodes, tells the story of mathematics professor Olga Barkovskaya, who is forced to become an amateur detective. Darya Novikova, Olga’s intern, is accused of murdering her husband. Barkovskaya is convinced of her innocence and begins her own investigation. It becomes clear that the killer can be found with the help of a book written by the victim. It contains a highly important encrypted message. However, the investigation is complicated by the fact that the killer is not sitting idle and constantly creates obstacles for the amateur detective.