In the late 1980s, when “perestroika” was taking place in the USSR and the era of the Soviet Union was about to collapse, life became unstable and very different. The 1980s brought not only freedom, but also waves of crime on the city streets. While some young people began to ‘grow up’ on the streets, others found it difficult to find their place in this unpredictable reality. Andrey, lives with his mother and five-year-old sister. He studies at a music school and often encounters street teenagers who harass him. To protect himself, Andrey makes friends with one of these teenagers, Marat, who introduces him to gang life. Youth groups fight for every piece of territory; they defend their right to live the life, even breaking laws and promises. The only thing that matters to them is the vows they make to their gang members-brothers, with whom they confront the violence and fears of the adult world.

On his birthday, Vitya jokingly makes his hair in the shape of a triangle, which greatly annoys his father-in-law. The conflict grows, Vitya's boss fires him from his job, his mother-in-law calls him a Satanist, and his father-in-law is completely ready to pierce Victor with his own gift - a dagger. As a result, the hero removes the ill-fated hairstyle, but leaves the house.

A young department employee learns that the fire alarm for which he is responsible only exists on paper. Trying step by step to uncover the criminal circle of a deceitful system, he seeks support from his uncle, the head of the department. But this circle unexpectedly closes ... on himself.