Emilia Varelli has been at Hogwarts since sixth year, and somehow, nobody has ever discovered her secret. She’s Theodore Nott’s twin sister. Different surname. Different history. Same blood. Theodore and Emilia have spent years making sure nobody connects the two of them, rarely acknowledging their relationship and carefully avoiding anything that could expose the truth. Then the Slytherin group chat decides to play truth or dare. What starts with harmless questions slowly becomes suspicious. Why do Emilia and Theodore answer questions about their families so similarly? Why do they seem to know exactly what the other is thinking? And why can they suddenly understand each other when Theodore switches to Italian? The more the group investigates, the closer they get to a secret Emilia and Theodore have spent years protecting. And this time, they might not be able to lie their way out of it.