From the acclaimed author of You Don't Know Me comes a novel that is equal parts family drama and thriller, as two parents conduct an increasingly desperate search for their missing daughter.

Someone is guilty.

For the last seventeen years, Harry and Zara King's lives have revolved around their one and only daughter, Sophie. One day, Sophie leaves the house, and is never seen again. It has been six weeks since that day, and the police are no closer to finding her than when they first started. Harry and Zara have questioned everyone who has ever had any connection to Sophie, to no avail. Except there's one house--no. 210 across the street--whose occupant refuses to break his silence.

Someone knows what happened.

The question mark over no. 210 devolves into obsession. As it does, Harry and Zara are forced to examine their own lives. One day, they realize they have grown and suffered apart in their separate spheres of grief. And now as they try to find their way back to one another, they must face the truth about their daughter, who she was, how she changed, and why she disappeared.

Someone will pay.

Told in alternating perspectives from Harry and Zara, and in a dual timeline between the present day and a year later in the middle of a trial for murder, Imran Mahmood's taut yet profoundly moving novel explores how differently grief can be experienced even when shared by parents--and how hope triumphs when it's placed in the kind of love that knows no bounds.