Welcome to the house where nothing is real—even murder. When Lily Sinclair disappears into the glittering world of Horizon House, her mother, Karen, knows something’s wrong. The influencers say she’s thriving. The videos say she’s free. But the silence says otherwise. After months of being ignored, gaslit, and shut out, Karen does what any desperate mother would do: she goes to war. Against the system. Against Horizon House. Against the man at the center of it all—charismatic founder Hugo Ames. As her campaign goes viral and the online world rallies behind her, secrets start to crack. And when tragedy strikes, one thing becomes horrifyingly clear: Lily wasn’t the only one being watched. Or the only one in danger. Told through shifting perspectives—Karen, her estranged ex-husband Jack, and Lily herself— How to Lose a Daughter is a razor-sharp psychological thriller about identity, influence, and the dark side of transformation.