Charlotte “Charli” Wilson thought Alex Andropov would always be her best BFF in the whole wide world. From crushes to butterfly phobias to secret hidden blankies, there’s never been a secret they couldn’t share. Charli even showed Alex the supersecret hiding spot for her diary.

But when school starts and Charli learns that Alex has betrayed her by sharing her biggest, most secretest secret, she realizes that maybe her bestie isn’t so great after all. Meanwhile, Alex has no idea what he's done wrong. He doesn’t know why Charli’s not talking to him. He has no choice (right? RIGHT?) but to take her diary and try to correct the record.

There’s always two sides to the truth—especially in fifth grade.