The devil's cut

When a distillery owner's body is discovered on top of a remote Scottish mountain, forensics confirm that he died of natural causes. DI Corstophine's concerns are raised however, when the dead man's eccentric sister receives a message, apparently from beyond the grave. The police are dismissive until it appears the devil himself is intent on attacking other family members. Why is his daughter kept locked and sedated in her room in the baronial mansion? Who or what is stalking his son as he scatters his father's ashes on lonely summits? And what insanity is behind the horrific attacks in their small Highland town? DI Corstophine and his team don't know what they're really facing until it's too late.