An announcement is placed in the local paper stating the time and place of a murder to occur in Miss Blacklock's early-Victorian house in the village of Chipping Cleghorn. However, the victim is not one of the several occupants (permanent or temporary), but an unexpected and unknown visitor.
A classic Agatha Christie tale (adapted for the stage) of mixed motives, concealed identities, a 2nd death, a determined inspector grimly following the twists and turns, with Miss Marple on hand to provide the final solution, at some risk to herself, in a dramatic confrontation just before the final curtain.