The popular rapper comes on tour in St. Petersburg. His fans adore and wait, he is at the peak of fame, he is confident in himself. Together with the star, his manager, musicians and a girl come. Suddenly an attempt is made on a musician. He miraculously manages to escape death, but his manager decides to hire a security guard. It turns out that the guard is ... a girl. She is a professional in her field, but in the brutal world of rap, a woman has a difficult time.

"Your husband is sleeping with your student" – Olga finds such a note in one of the bouquets that were presented to her in honor of her triumphant speech at the scientific forum. Olga is a mathematician. She can easily figure out who sent this anonymous letter. Except this man is found dead. This is how a dangerous game begins, each move of which is associated with one of the Fibonacci numbers. What do they mean and how are they related to Olga's life? The answer is far in the past. Every mistake will cost the life of someone close to the heroine.

In the regional centre Kuznetsky the mayor has been killed in his office. The murderer is Dimur Kavsadze, in charge of commercial construction work for the city administration. A squall of public concern beleaguers the city. Alexander Danilin is an undercover curator, an intermediary between the business and the authorities; he tries to eliminate trouble and return life to normal. The cause of the tragedy was a construction project, which wrapped itself around Kuznetsky like a tumour, and which was a source of profit for the authorities and the local builders. The construction “devours” free land, the souls of people and even what seems beyond the law of profit: the family. Neither the death of people, nor common sense can stop the construction…

In the summer of 1999, in one of the cities in southern Russia, a terrorist act took place - the explosion of a residential building. The investigation into this case is led by an FSB operative, Captain Andrei Vereshchagin, nicknamed Captain Hollywood.

Nick overhears his girlfriend sleep talking about an eerie murder. The next night she adds up more details, and he becomes paranoid.