When threatening letters arrive at his fashionable London home, prominent Government Minister Sir Paul Berowne (Bosco Hogan) calls his old friend Adam Dalgliesh (Roy Marsden) for assistance. Berowne's own household is a challenge. His exquisite wife (Wendy Hiller) makes no secret of her adulterous affair with a fashionable surgeon. His only daughter (Fiona Fullerton), deeply involved in left-wing politics, has rejected her Conservative father. He is even resented by his own, strong-willed mother, whose favored son was killed in an IRA terrorist ambush. Dalgliesh has barely started on the case when a series of bizarre deaths turn the informal investigation into an urgent assignment. With characteristic determination Scotland Yard's enigmatic star detective pursues every possibility, ruthlessly exposing dark secrets and ugly emotions as the case proceeds toward its terrifying and bloody conclusion.