After seven years of silence, Guy Markenmore returns to his family home at Markenmore Court. Knowing his father Sir Anthony to be close to death, he is anxious to reassure his younger siblings that he will not make any claim to the family money even if he can't help inheriting the old man's title. Sir Anthony dies later that evening, but the question of the inheritance becomes academic when Guy is murdered whilst crossing the downs. It is now up to detective Blick to track down the person responsible for Sir Anthony’s death.