It was supposed to be a harmless prank. Then a truth spell swept through Hogwarts. Now nobody can lie. Not students. Not professors. Not anyone. As secrets begin spilling across the castle, friendships are tested, crushes are exposed, and years of carefully hidden thoughts suddenly become impossible to keep hidden. For User and her friends, what starts as entertainment quickly turns into a disaster as uncomfortable questions start getting answered a little too honestly. With twenty-four hours standing between them and normality, there’s only one problem: Some truths are a lot harder to take back once they’re spoken aloud.