Calder and Tosh stand over the body of the latest victim, lying in a remote ruin at the water's edge. Tosh sees the hand of organised crime in the murder but Calder casts doubt over her theory.On the other side of the island, crofter Agnes Moffat's morning drive is interrupted by a gun-toting Howell who forces her back home to look after the wounded Nowak while they wait for a means of escape.Elsewhere, Tosh and Calder deliver the grim news to the victim's family. Grief and shock turn into action as they take matters into their own hands.
Calder is embarrassed to find her personal life becoming part of the investigation when Cal Innes, under Sandy's interrogation, uses her as his alibi. Unimpressed Procurator Fiscal, Harry Lamont, questions Calder's suitability for the case but Tosh comes to her defence.Elsewhere, a family meal ends with an alarming discovery for Calder, while, at the mortuary, Tosh is faced with evidence which sends their case in a dark new direction.