Bertha Mae Stewart--otherwise known as Bertie--is ready for anything grade 6 can throw at her. She spends every day with her best friend Kevin, enjoys delicious cookies at her grandmother's, and has an adorable baby half-brother to dote on. But then her teacher announces a public speaking assignment, she's paired up with her worst enemy for the project, and her inside voice won't stop telling her that everything is going to go wrong. And of course, there's that nagging little secret Bertie can't tell anyone about. Most days, a trip to her favourite tree or a hug from Grammy are enough to make Bertie's anxiety go away for a short while. But as life grows more complicated, and Bertie pushes the noisy feelings further down, the pressure inside of her starts to build. And someday soon, she won't be able to hold it all in.