Young Jakub, whose true love Vera has been killed, is convinced that the regional mafia boss was responsible for her death. Jakub is a junkie and occasional drug dealer, but is fighting his drug dependence and wants to avenge his girl's death. The time for revenge is arranged for the fancy-dress party at the ZOO night-club, but at the key moment Jakub finds himself incapable of shooting the man he believes to be the murderer, and has to flee. However, he discovers a witness who is able to clarify the circumstances of Vera's death, and the story reaches its fateful denouement.