Philadelphia heiress Tracy Lord throws out her playboy husband C.K. Dexter Haven shortly after their marriage. Two years later, Tracy is about to marry respectable George Kittredge whilst Dexter has been working for “Spy” magazine. Dexter arrives at the Lord’s mansion the day before the wedding with journalist Mike Connor and photographer Liz Imbrie, determined to spoil things.

On his uncle’s death Sir Henry Baskerville returns from abroad and opens up the ancestral hall on the desolate moors of Devonshire. Holmes uncovers a plot to have Sir Henry murdered by a terrible trained hound. First casting of Rathbone and Bruce as Holmes and Watson.