A young mother attempts to steer her daughter away from sex, only to find that history has a way of repeating itself. Karen (Catherine Tate) was just a teenager when she gave birth to Charlie (Holly Grainger), but with a little help from Charlie's mother Nan (Anne Reid) everything worked out for the best. Even so, Karen can't help but feeling as if she missed out on her youth due to motherhood, and she's determined to see Charlie graduate from college. But when Charlie gets pregnant, her brainy friend Daniel (Robert Pattinson) steps in to help, and Karen finds her worst fears coming true.