Downton star Joanne Froggatt stars in new crime thriller - how you can watch it

Golden Globe winner Joanne, who also starred in The Liar, Dark Angel and Bad Girls, takes the lead as Sergeant Jackie O’Hara in the dark chiller, written by games performance director Mark Healy.

Storyglass is a scripted podcast label from Fremantle which will be available from Thursday June 25.

It opens on a remote island in the north west of the Scottish mainland at Easter last year.In an isolated farmhouse a family lies slain. Their daughter, left untouched, is found wandering the hills, lost and bewildered.

As a once-in-a-generation storm gathers on the horizon and the girl is taken into protective custody, a mysterious stranger is seen watching the darkening skies near the crime scene.

He is arrested by Sergeant Jackie O’Hara but, when questioned, refuses to give his name and repeatedly warns of a coming evil. The next morning Jackie finds his cell empty. The stranger is gone. And so is the girl.

The Harrowing tells the story of the devastating events that occur on the Isle of Toll Mòr over five days between Holy Wednesday and Easter Sunday, as recounted by the only survivor - Sergeant O’Hara.