What a Carve Up!

The relatives of Gabriel Broughton are summoned to Blackshaw Towers, an old, isolated country house in Yorkshire, to hear the reading of his will. The solicitor reveals that they have all inherited nothing, except Linda Dixon, who is bequeathed Gabriel's medicines and syringe, much to her amusement. They discover a secret passage, uncovering the means by which the murderer was able to leave the locked room. They suspect Fisk, who was not present, but he has an airtight alibi.