Two years have passed since Sasha left the orphanage. It is difficult for her to adapt socially, she perceives the world as a hostile environment. Since childhood, the girl has been used to defending her right to life and solving problems through fights – she spends all her free time in the basement hall in the ring for fights without rules. Despite the fighting nature and hobbies, deep down Sasha dreams of exactly the opposite: not to cripple people, but to treat them. But there is no money for studying at a medical school, and they do not take people to a hospital without an education. Fate brings her together with a disabled teenager Kolya, whose mother is torn between her son, work at a fish factory and a policeman boyfriend, and tries to find a nurse for her son. This meeting radically changes the lives of all the heroes.

Eighteen-year-old girl Alena decides to meet her biological father. Vasily, a veteran of the First Chechen War, lives alone and works as a switchman on the railroad. The arrival of his daughter completely changes the life of the hero.

The routine life of the eleventh "B" of the capital's school ends abruptly with the arrival of the new girl Sonya, who turns out to be completely different from her classmates. They will fight for her attention, they will be afraid of her sincerity, and with her... they will not want to be on the same side?