A letter for Miss Marple from a recently deceased friend promises a large reward for investigating a crime - without telling her who was involved, or when it happened! When she accepts, she is given a reservation for a coach tour of historic homes and gardens. She has fifteen fellow-passengers - and one of them knows a murderer's secret and someone is preparing to kill.
原本拥有美满生活的拉菲克有一天突然无端发狂，砸烂了办公室并跳出窗外，人们以为他企图自杀。最终拉菲克被捕入狱。四年后，拉菲克刑满出狱，他心里只有一个念头：带儿子去看看他的发现——他一切行为的源头。尽管妻子和岳父极力阻止，他还是从学校带走了儿子。在躲避警察的过程中，他们偶遇了一位牧羊人，并在一座乡间小屋过夜，事情开始变得奇怪了起来……
