Kath Redway's car plunges into Burrator Reservoir, an event she initially dismisses as a mere accident, but which soon unravels into a terrifying conspiracy. Kath survives the crash with amnesia, returning to her remote farmhouse and family, only to find her husband Adam cold and her daughter Lyla speaking of a 'man on the moor.' As fragmented memories resurface, Kath realizes the accident was no accident, and her life descends into a menacing and terrifying reality where the truth is obscured and danger lurks.

The premise sets up a classic psychological thriller, focusing on a protagonist piecing together a fractured reality after a traumatic event. The narrative structure likely involves suspenseful reveals and a growing sense of unease as Kath's memories return and her family's behavior becomes increasingly suspect. The isolated moorland setting suggests an atmosphere conducive to paranoia and hidden dangers. The author's previous success with 'The Ice Twins' indicates a readership familiar with and appreciative of intricate, suspenseful plots with dark undertones.