Mollie Black first met Callen by accident in school then she was hired as a summer nanny for the famous designers Lacey Kingham. She's thrilled about the job until she realizes that she has to share the guest house with Lacey's brother, the same Callen Grey, the hottest guy and biggest player on her college campus, who Mollie finds incredibly annoying and way too cocky for his own good. Once she starts getting to know the real Callen, can she stop herself from falling in love? Callen is annoyed because Mollie seems to be the only girl on the planet resistant to his charms, so he makes it his personal goal to get her to fall for him so he could break her heart at the changing his player ways forever?