Seventeen is nothing like Codi Teller imagined. She's never crashed a party, never stayed out too late. She's never even been kissed. And it's not just because she's gay. So when her two best friends suggest crashing a party, Codi is highly skeptical. Those parties aren't for kids like them. They're for cool kids. Straight kids. But then Codi stumbles upon one of those cool kids, Ricky, kissing another boy in the dark, and an unexpected friendship is formed. In return for never talking about that kiss, Ricky takes Codi under his wing and draws her into a wild summer filled with late nights, new experiences, and one really cute girl named Lydia. The only problem? Codi never tells her best friends about any of it.