It's the summer before senior year. Reid is in the thick of Scofield High's in-crowd thanks to her best friend, Hattie, who has been her social oxygen since middle school.But summer is when Hattie goes to her family's Maine island home. Instead of sitting inside for eight weeks, waiting for her to return, Reid and their friend, Sam, enter into a pact--to live it up, one party at a time. But days before Hattie is due home, Reid finds out the shocking news that Hattie has died by suicide. Driven by a desperate need to understand what went wrong, Reid searches for answers.In doing so, she uncovers painful secrets about the person she thought she knew better than herself. And the truth will force Reid to reexamine everything.