When the call comes in about Lucy, a seventeen-year-old girl murdered after the secret party she held in her parents’ home, Detective Lottie Parker is first on the scene. As she picks her way through the smashed glasses and the blood spatter on the perfect cream carpet, she is horrified to see Lucy’s angelic face, silvery-blue eyes forever closed. As Lottie breaks the news to Lucy’s heartbroken parents and the devastated partygoers, she discovers that hours before her death Lucy had revealed a terrible secret about her friend Hannah. And when Lottie finds Lucy’s bloodstained clothing hidden in Hannah’s bedroom, she has no option but to bring the shy, frightened girl into custody. But Hannah claims to have no memory of the night Lucy died and Lottie begins to question her guilt. Then a fifteen-year-old boy who also attended the party is pulled from the canal. And as Lottie investigates, she discovers something shocking. Her own son Sean was at the party. Why did he lie to her? Is her beloved child a witness or a suspect… or is he now in the killer’s sights?