Fifteen-year-old Efra n and his two younger brothers live in a house on the hillside in Monterrey, Northern Mexico. They are left to fend for themselves after their mother is wrongly arrested for theft. M has raised her boys to keep out of trouble with the local gangs and to study for their future, but they are viewed by society as good-for-nothings or criminals simply because of where they live. The only people offering any kind of support are the local gang members - but everything comes with a price tag