It's going to be a great summer vacation. At least, that's what Roxanne thinks. Then, just before the end of school, trouble seems to follow her and her older brother wherever they go. Rox can't bring herself to finish her English assignment, and this boy, Michael, is taking up way too much space in her head. And that's not all that's wrong. Something weird is going on with her parents too. To make matters worse, anything and everything makes Rox cry. What's the matter with everyone? One Thing That's True is a moving story about family relationships and the consequences of telling helpful lies. It's also about an adolescent trying to figure out what acceptance means and how much it matters.