Sasha, Pasha and Lesha meet at a therapy course for men traumatized by women. Yes, there are some, because in the world of strong women, many men have lost themselves. But our heroes do not want to be victims, they decide to "go on the warpath" and restore justice. One problem - they are still slobs.
"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.