Aging Major Palgrave, an idiosyncratic but charming mystery writer, reveals to Miss Jane Marple that one of the guests at a luxurious Caribbean resort they're staying at is a Bluebeard-type wife murderer. Unfortunately, the Major succumbs to an apparently accidental overdose of alcohol and blood pressure medication before revealing the killer's identity. When it's discovered that the medicine belonged to another guest and the revealing photograph the Major was carrying is missing, Miss Marple realizes that the serial killer has struck again and more murders will follow.

Vacationing in a small town, a frantic Daniel Corban shows up at the local police station, declaring that his wife has disappeared. Corban imperiously demands that the easygoing police inspector drop everything and find his missing spouse. Within a few days, a woman claiming to be his wife shows up, but Corban insists that he's never met the woman before.

When Detective Bennett O'Mara finds a chocolate wrapper on a strangled girl, it leads him to enigmatic chocolatier Juliana Lovece. Just as this perceptive woman gets under his hardened skin, he suspects she may be at the centre of an increasing murder count.

The true life story of Margaret Rutherford (1892-1972) is in fact much more eccentric than the most famous fictional role she ever played: Miss Jane Marple, Agatha Christie's amateur sleuth. Rutherford's version was the very first appearance of Miss Marple on the big screen and it was far removed though from the petite, upper middle-class lady in the detective novels.

Librarian and real crime buff Aurora “Roe” Teagarden never liked Detective Sergeant Jack Burns, but she also never wanted to see him dead. When his body is found outside of Aurora’s home, she then becomes the main suspect. Determined to find the killer and clear her name, Aurora can't help but to get involved once again.