《同级生》作者中村明日美子的耽美漫改新片。壹河光夫和市川光央从少年时代就形成了一个听从另一个命令的主仆关系，长大后的一件谋杀将指引他们再度交织。
一名13岁的男孩，在1880年代堪萨斯州父母去世后，不得不独自照顾自己和弟弟。他因意外杀死一名当地牧场主而被判绞刑，在此之后，他与长期疏远的祖父一起开始了逃亡之旅。
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.
