Iva and Marija, a young lesbian couple, rent an apartment in Zagreb, in a building that seems to provide a quiet and safe environment for their love, but over time the atmosphere in the building becomes more and more threatening. The elder landlady Olga dominates the building. Other tenants include her calm husband, her grown-up son Daniel who has a crush on Iva, the prostitute Lidija, an abused housewife, a widower keeping the corpse of his newly deceased wife, a gynecologist performing abortions in one flat of the house, and an ex-soldier who regularly plays martial music at night. After Olga finds out that Iva and Marija are lesbians, the situation escalates .

The recently divorced father of a nine-year-old, furious his daughter can't spend her birthday with him, bursts into her classroom with a birthday cake and a rifle. A hostage crisis ensues, and the mayor of the town in which the events take place will try to use the situation to gain advantage ahead of the elections, stopping at nothing. The son of a young policeman is in the same class, and before the events unfold, he'll have to answer a question as well.