"I searched his pockets. I found the usual - handkerchief, keys, loose change, wallet - but there was also something completely bizarre..."

Rex Fortescue, the head of an economic empire, was enjoying his morning tea when he suddenly dropped dead in excruciating pain.

The autopsy attributes the death to poisoning - and unfortunately, there are many suspects. Fortescue was not exactly beloved. Meanwhile, seeds of monkshood are found in his pocket, and no one can explain how they got there...

Things will get worse, the bodies will multiply, until amateur detective Miss Marple arrives at the Fortescue mansion. The shrewd old lady has personal reasons to get involved in the case. And she manages to do what the police cannot do at that moment: get inside the mind of the murderer, apprehend his plan. And predict his next move...