Morgan kneels beside the fluttering crime scene tape. Their hands clasped, the couple's embrace looks loving and warm, but an icy chill grips the air. Their lips are blue, and blood is dripping on the floor. They have been silenced forever... When sweet-natured teaching assistant Rosie Waite, and her boyfriend Matt, are found dead in their quaint family home in the Lake District, Detective Morgan Brookes is horrified. Sleeping just two doors down, she heard no screams for help, no slamming doors, or alarms in the night. A twisted killer nailed the couple's lips shut, and Morgan vows to keep watch over every innocent family in Rydal Falls until this monster is brought to justice. Climbing the narrow attic staircase as she searches every inch of the property, Morgan finds a mattress on the floor, empty food wrappers, and a letter that reads: if you've found this, you're next to die. Fear washes over Morgan's team; the killer was watching his victims, and now her life is at risk.