In the brilliant red doom of a Hampshire Sunset, Brigit Conti can hear a voice behind her ears that is not her own. Bed-bound and complaining of a rare bone disease that no doctor can diagnose, her husband fears that the house they have purchased is a portal through which an older, more malign energy has passed, possessing his wife and son. Through their successive deterioration, his secular and agnostic worldview undergoes a metamorphosis, drawing him to a strange man from the hills - the Rector, their unlikely saviour - or are he and his family merely victims of their own self-serving yuppie way of life?