From her downstairs apartment in suburban London, Emma has often overheard the everyday life of the seemingly perfect family upstairs--Steph, Paul and teenage daughter Freya--but has never got to know them. Until one day, she hears something that seizes her attention: Freya has vanished and the police are questioning Steph and Paul about their life. Do either of you have any enemies? Anyone who might want to harm or threaten you? The effects of Freya's disappearance ripple outward, affecting not just her parents, but everyone who lives in the building, including Emma and local driving instructor Chris, who was the last person to see the teenager before she went missing. Each character's life is thrown into sharp focus as devastating mistakes and long-held secrets are picked apart and other crimes come to light--including a child gone missing 25 years before, and a shocking murder--that make clear that the past never stays where we leave it, and that homes can be built on foundations of lies.