简介：OldmissMarpleisonatrainridewhenshewitnessesamurderinapassingtrain.Shereportsittothepolicebuttheywon'tbelieveher:sincenobodycanbefoundtherecan'thavebeenanymurder,right?Asalways,shebeginsherowninvestigation.ThemurderwascommittedwhilepassingAckenthorpeHallandmissMarplegetsherselfajobthere,mixingcleaningandcookingwhilesearchingthehouseforclues.