Faith's father has been found dead under mysterious circumstances, and as she is searching through his belongings for clues she discovers a strange tree. The tree only grows healthy and bears fruit if you whisper a lie to it. The fruit of the tree, when eaten, will deliver a hidden truth to the person who consumes it. The bigger the lie, the more people who believe it, the bigger the truth that is uncovered. The girl realizes that she is good at lying and that the tree might hold the key to her father's murder, so she begins to spread untruths far and wide across her small island community. But as the tree bears more and more fruit, she discovers something terrifying — that her lies were closer to the truth than she could ever have imagined...

The first things to shift were the doll's eyes, the beautiful grey-green glass eyes. Slowly they swivelled, until their gaze was resting on Triss's face. Then the tiny mouth moved, opened to speak. What are you doing here? It was uttered in tones of outrage and surprise, and in a voice as cold and musical as the clinking of cups. Who do you think you are? This is my family. When Triss wakes up after an accident, she knows that something is very wrong. She is insatiably hungry; her sister seems scared of her and her parents whisper behind closed doors. She looks through her diary to try to remember, but the pages have been ripped out. Soon Triss discovers that what happened to her is more strange and terrible than she could ever have imagined, and that she is quite literally not herself. In a quest find the truth she must travel into the terrifying Underbelly of the city to meet a twisted architect who has dark designs on her family — before it's too late...