Mia isn't skinny. She isn't popular. She isn't beautiful. She knows all that. She'd be okay with it, if her mother would just let up, a little, stop criticizing, stop giving hurtful "helpful" tips on how to look thinner, how to dress better. And she'd be okay with that if her cousin Corinne, who she'd been so close to and in sync with her entire life, hadn't suddenly become a different person. Someone who suddenly cared about money and looks and that certain rich-beautiful-ballerina-skinny something that Mia just doesn't have.
Mia's middle-class family is spending the summer with Corinne's family in the Hamptons, and Mia just doesn't fit in with Corinne's rich, perfect friends. Instead, she finds herself spending time with Simon, a boy from the Midwest who's family is renting the next house over. He's pale, he's skinny, he's well-read and brilliant, and he doesn't fit in, either. But he fits perfectly with Mia.
I...honestly, I didn't like this book. It wasn't the writing. Maybe it was just that I was never gripped by Mia, which made it hard to get into the story, since there...wasn't much story. I spent most of the book wondering what the point of it was, and I just didn't care enough for the Big Finish to matter to me. I wish I'd liked it, because it's a quiet, introspective, summer-y beach-book, but it didn't do it for me. It was just okay.