Ty, Hector, and Bao are close friends in a tough section of Boston, where they're called "the PG-13 crew." They're 14, decent kids with few skills who've bailed out of school. A small gang of older tough guys, led by Marcus and Tommy, menace them, and when the PG-13s fight back and rob one of the gang, Marcus and Tommy vow to kill them. They seek protection from Derick, a drug dealer, who agrees to help if they'll sell drugs. Meanwhile, Ty is recruited to work at a community center by J.J., its quiet leader. Ty and his friends are in a squeeze: surrounded by violence, drugs, and no opportunities, is there any way out?

After his daughter is kidnapped and his wife murdered by drug dealers, a man finds that the gang is protected by corrupt politicians, and sets out to wipe out the gang and expose the politicians.