Talia is 13. After a run-in with her stepfather, she and her dog, Kim, run off to stay with a buddy in a nearby suburb. The buddy's not there. He's been taken into care. Talia meets a bunch of four guys her own age. They're fresh and smart, like her. They seem interested in her, but in fact they've already decided to lower her defenses in order to steal her dog and either sell it or use it as a fighting dog. They steal Kim that evening. Talia is so wild with loss and rage that the kids nickname her "Tyson". They tell her that some big guys stole her dog. Talia only half believes them, but they go out and pretend to search for the dog. The big guys show up and bully the little fellas into handing over the dog, so they can make money out of him. Illiès, the oldest of the four kids, gets to like Talia more and more. He wants to give the dog back to her, but his three pals‹Mous, Nassim and Rachid‹won't hear of it. In the meantime, the big guys are pitting the dog in fights. They figure there's plenty of time to sell him back to the girl later. Illiès gets a little gun for Talia to defend herself with. Now nothing can stop Talia from getting her dog back...