Enhanced descriptions from Syndetics:

Combining the classic ingredients of a murder mystery with elements of horror, apparitions and hairbreadth episodes, "The Skull Beneath The Skin" creates a dark and claustrophobic atmosphere in a masterpiece of crime fiction. When leading actress Clarissa Lisle receives threats to her life the young detective, Cordelia Gray, is hired to accompany her to a private island where she is going to star in "The Duchess Of Malfi." In this gripping dramatization, the sharp-witted slueth, played by Greta Scaachi, finds herself in the enclosed setting of a chilling country house on an island with a blood-stained history.