very typical post-Soviet era storyline. A bunch of vagabonds lured an innocent teenage girl to their apartment, offered her a drink, intimidated, then gang raped her. Local cops are incapable to undertake an adequate actions against the scoundrels - prevented by the superior chief of the local police, who is the dad of one of the scumbags. The case is closed. The girl's granddad tired of an endless circumlocution decides to take revenge in his own hands.

Overview from themoviedb.org