For sixteen years, Josie Gardner and her mom, Kate, have been a team. It's been the Gardner Girls against the world, and that's how Josie likes it. Until one day, they find out that Paul Tucci, Kate's high school boyfriend-the father Josie has never met-is back in town. Josie's mom suddenly turns back into the heartbroken teenager she was when Paul moved away. Meanwhile, Josie's on the verge of having her first real boyfriend. And when Josie learns some surprising truths about Paul Tucci and the past, she begins questioning what she thought she knew, and finds out what happens when a girl gets the guy she always wanted and the dad she never knew she needed.