In a close-knit community of young families in south Wales, the mums and dads are concerned that their underage teenagers have started having sex too young. Thirteen-year-old Christopher has been having sex with his girlfriend for a year, despite his mum's best efforts to stop him. Will a heart-to-heart about her own teenage experiences encourage him to slow things down a bit? Fifteen-year-old Angharad's parents have just discovered she's recently lost her virginity, and they've grounded her. But they can't keep her indoors forever, and have to decide whether or not she should start taking the contraceptive pill.