Good girl and self-confessed nerd Penny can't believe her luck when she is accepted into the popular group at Sixth-Form college after hooking up with the sweet and clever Henry. But it is bad boy of the group Callum who has her heart racing and her temperature rising, and not always for good reason. As they embark on a highly charged relationship, Penny wants everyone, including Callum, to see him for who he really is. But has Penny made a terrible mistake, and was everyone else right all along?