White Nights by Ann Cleeves. 

White Nights
By Ann Cleeves.
Dramatised for radio by Iain Finlay MacLeod.
Atmospheric crime drama set in Shetland at midsummer - the time of white nights, when the sun never quite leaves the sky and birds sing at midnight.
The launch of Bella Sinclair's art exhibition, at the Herring House Gallery in the remote hamlet of Biddista, is ruined by the appearance of a distressed stranger, claiming amnesia. The man is later found hanged but local detective Jimmy Perez has a hunch that it's murder not suicide.
When the dead stranger is finally identified, strands of clues point towards a dark secret held deep within the collective memory of the community, one which has brought death to the present.
Cast:
D.I. Jimmy Perez ..... Steven Robertson
Kenny ..... Finlay Welsh
Edith ..... Anne Lacey
Bella ..... Eileen McCallum
Fran ..... Tracy Wiles
D.I. Roy Taylor ..... Robin Laing
Peter ..... Steven McNicoll
Roddy ..... Finn den Hertog
Producer: Kirsteen Cameron.