Rachel Walls has spent most of high school saying no. No to dances, no to parties, and most especially, no to boys. Now she's graduating at the top of her class, and for the first time in her life, there's nothing stopping Rachel from having a little fun—except herself. So when she stumbles on a beat-up old self-help book, a crazy idea pops into her head: What if she just said yes to . . . everything? And so begins Rachel's summer of yes—yes to new experiences and big mistakes. Yes to scooping ice cream alongside Miles, the guy she's known forever; yes to spontaneous road trips with her longtime crush, Clayton; and yes to seeing the world in a whole new way.