A mysterious letter from New Orleans arrives to disturb the untroubled existence of Combe Raven House in West Somersetshire.
What is the secret being kept by Mr and Mrs Vanstone from their devoted daughters, Magdalen and Norah?
Wilkie Collins novel dramatised in six parts by Elizabteth Bradbury.
Directed at BBC Birmingham by Anthony Cornish.
First broadcast on BBC Radio 4 in 1989.