The film opens with a rapid montage of news footage depicting urban riots in a banlieue near Paris, sparked by Abdel Ichaha’s grave injury while in police custody. The unrest quickly escalates into a siege of the local police station and the theft of a police revolver. Over roughly twenty consecutive hours, we follow the lives of three friends from immigrant families who navigate a city tense with suspicion, anger, and danger.
Vinz, Vincent Cassel, is a young Jewish man with a volatile temper who harbors a burning need for revenge after Abdel’s injuries. He openly resents the police and idolizes a certain grim cinematic bravado, practicing behind a bathroom mirror as if preparing for a larger confrontation. Alongside him is Hubert, Hubert Koundé, a Christian Afro-French boxer and small-time drug dealer who dreams of breaking free from the banlieue’s constraints, even though his boxing gym has been destroyed by the riots. The third friend is Saïd, Saïd Taghmaoui, a North African Muslim who often acts as the peacekeeper between Vinz’s rage and Hubert’s caution.
The trio’s routine life unfolds under the watchful eyes of the police, a constant reminder of the fragile line between daily survival and sudden violence. A rooftop party is shut down by plainclothes officers, and Vinz’s temper comes to a head when he insults one of them. After they leave, Vinz discovers the revolver lost during the riot and vows to use it to kill a police officer if Abdel dies. Although Hubert disapproves of violent revenge, Vinz secretly takes the gun with him, setting the stage for a tense moral test that threads through their every move.
Visits to Abdel in the hospital are blocked by the very force Vinz hates, and Saïd is arrested for his defiance before being released with the aid of a police officer who happens to know his brother. The three friends drift apart for a while: Vinz and Saïd stay together, while Hubert returns home to consider another path. They eventually reunite at another gathering in the banlieue, where Abdel’s brother’s actions escalate the violence as he tries to kill a police officer in a fit of revenge. In the ensuing clash, Vinz nearly shoots a riot officer, and the trio manages to slip away and board a train to Paris. Their encounters with Parisians—both friendly and hostile—drive the tension higher and push them toward rash choices.
A chance encounter in a public restroom with a Polish survivor of the gulag leaves them unsettled, as the man narrates a story about a man who froze to death after refusing to relieve himself in public near a train. The meaning of the tale remains elusive to them, adding to the film’s uneasy mood. Later, they meet Astérix, a frequent cocaine user who owes Saïd money; tempers flare as Astérix tries to force Vinz to play Russian roulette, though the gun is secretly unloaded. When they again come face-to-face with plainclothes police officers, Saïd and Hubert are arrested, while Vinz escapes and is subjected to verbal and physical abuse that leaves him jailed late into the night. The three miss the last train home from Saint-Lazare and end up spending the night on the streets.
Their attempts to find shelter lead them to a failed car hotwire, an art-gallery ejection, and a rooftop confrontation where they briefly insult a group of skinheads. They take refuge in a shopping mall, where the news broadcasts Abdel’s death, and Vinz vanishes again. Hubert and Saïd later confront the gang of skinheads they had provoked, and Vinz follows with a gun pointed at a cop. Hubert and Saïd, angered, abandon Vinz to his fate at the mall.
In the early morning, the trio returns home, and Vinz hands the gun to Hubert. The moment of reckoning arrives when they encounter the officer Vinz had insulted at the rooftop party. The officer seizes Vinz, pressing a loaded gun to his head. Hubert rushes to help, but the officer fires accidentally, killing Vinz. A tense Mexican standoff erupts between Hubert and the officer, each holding a gun on the other. In a closing voiceover, Hubert tells a haunting story about a man falling from a building, a bleak metaphor for society’s decline, while Saïd closes his eyes as a gunshot sounds. The film leaves the outcome unresolved, lingering in the ambiguity of what comes next.