Chantelle is a good student who only wants to pass her exams, but her feckless mother has taken off with her latest boyfriend and she's single-handedly raising her tearaway nine-year-old brother Leon. And Leon has made some new friends: teenage gang members who have given him a mobile, a knife - and some drugs to hide in her flat. A part-time job seems to be the answer to Chantelle's prayers. But the violence is about to come home - and the only person who's offering any help seems to be just as bad as the people she's trying to escape from...