In the first of a brand new series of four new adaptations. When Miss Marple learns of the deaths of businessman Rex Fortescue, his young wife Adele and their housemaid Gladys, the circumstances vividly recall the nursery rhyme Sing a Song of Sixpence, and since Miss Marple had trained Gladys herself she has a very personal reason to investigate...

The opulent family household is run under the watchful eye of housekeeper Mary Dove, but Miss Marple soon sees it is a fractured home - Rex's son Percival is desperately trying to save the company whilst neglecting his wife Jennifer, and a bitter sibling rivalry has re-ignited since the return of younger son Lance with his aristocratic new wife Pat. With the help of Inspector Neele and Sergeant Pickford, Miss Marple questions why Rex's daughter Elaine and the debonair Vivian Dubois should be so evasive about their whereabouts at the time of the murders, and she begins to understand the significance of the blackbirds that have been making unexpected appearances...

With her mischievously beguiling manner Miss Marple draws vital clues to make sense of the rhyme and at last reveal the truth!