Wealthy businessman Rex Fortescue collapses and dies in his office. It is determined that he was poisoned, and a handful of rye is found in his pockets. No one seems too upset, as everyone agrees that Rex was a tyrant. Soon, however, Rex's young wife also ends up poisoned. The maid, Gladys, whom Miss Marple trained, writes to her asking for help. Miss Marple arrives too late, as Gladys' body is found strangled. Miss Marple senses a connection between the deaths and a well-known nursery rhyme, "Sing a Song of Sixpence". Now it is up to her to find the cold-blooded killer and to deliver justice.moreless
A craft centre in the old mill at Morton Fendle is losing money. Several locals have invested in the business and believe they have been swindled by Alan Hollingsworth, the man behind it. When Hollingsworth's glamorous wife Simone goes missing, Barnaby believes she has been kidnapped and puts Hollingsworth under observation. However, Hollingsworth evades the police, carrying a bundle of cash, and a woman neighbour who follows him to his rendez-vous is killed in a bizarre road accident. Then Hollingsworth is found dead, and Simone turns up alive. Barnaby guesses she and a friend faked the kidnapping, but he can't prove it.
Vicky finds an old claymore (a Scottish sword) in her attic. Lovejoy buys it at auction and is offered much more than it's worth for it. Puzzled, he investigates and finds the claymore is a map to buried treasure. Someone tries to steal it, so Lovejoy is not the only one hot on the trail. But the treasure is elusive - a supermarket has been built on top of it.