Full spoilers follow.
The chain of causation is the film's real subject. Issa, a known juvenile delinquent, steals Johnny, a lion cub, from a travelling circus. The owner, Zorro, goes to the local community leader known as "the Mayor" and threatens to return with firearms unless the animal is produced. The Anti-Crime Squad — Stéphane, Chris and Gwada — is drawn into recovering a stolen lion, and that absurd errand becomes the thread that unravels every arrangement holding the estate together.
The turning point is the attempted arrest, which the squad loses control of and which a drone flown by a boy named Buzz captures from above. What the drone records converts a bad afternoon into an existential threat to the officers' careers and liberty, and the rest of the film becomes a hunt for the footage — the adults now pursuing an image with the same urgency they pursued the lion, while the child at the centre of it is left to heal and to plan.
The ending. The officers chase the teenagers and walk into a trap Issa has prepared. They are overrun by a much larger group of youths and pinned in a stairwell, fighting for their lives. Chris is wounded when a bottle breaks on his face. Stéphane radios for backup, but the backup car is destroyed on arrival and the responding officers flee. Issa lights a Molotov cocktail and prepares to finish the squad off with it; Stéphane draws his weapon, aims at the boy and warns him not to. The screen fades to black while both of them are still deciding what to do.
Then the title card: Hugo's "there are no such things as bad plants or bad men. There are only bad cultivators." Retroactively, this reorganises everything. The uprising is revealed not as a crime wave but as revenge for intergenerational injustice — every adult authority in the film, police and community leaders alike, was willing to sacrifice a child to secure its own position, and the children have simply presented the invoice. The lion, in hindsight, was never the plot; it was the diagnosis, a caged predator in the hands of a boy everyone assumed was powerless.
The refusal to show the outcome is the point. By withholding the last second, Ly declines to name a guilty party: the open final shot implies that both sides bear responsibility for people being driven to their worst selves, while the epigraph insists that the ground they grew in was poisoned by someone else entirely. The film ends, deliberately, on the unresolved space between those two claims.