Through e-mails, letters, blog entries, and movie scripts, twelve-year-old Ruth, an American girl, and Ruby, an English one, discover that they are long-lost twins.

Twelve-year-old Mischa "Ish" Love's longtime dream has been to someday live on Mars, but when she collapses on the first day of seventh grade, Ish receives a diagnosis which threatens her future plans.

As Tink Aaron-Martin writes an encyclopedia of her life, she also tells the story of the summer leading into her eighth-grade year.

While seventeen-year-old Sloane shares a drunken kiss with her best friend Piper's boyfriend Soup, Piper is murdered on a nearby beach, and over the next few days, Sloane and Soup are left reliving their past moments with Piper, wondering if they are responsible for her death and figuring out how to move on without her.