Should teenagers who commit serious crimes be tried as juveniles or adults? What happens to young offenders who reach the 'end of the line' in the juvenile court system - and how do you rehabilitate these young people to prevent future criminal behavior? FRONTLINE explores these questions as it follows four juvenile offenders - one white, two Hispanic, and one African American - through the Santa Clara, California, juvenile courts, observing how the criminal justice system treats their cases and determines their fates.