在这部信札疑云剧情/悬疑片中,本片由日本松竹电影公司于1979年拍摄，原著取自埃勒里·奎因的小说《灾难之城/凶镇》，侦探的名字也从埃勒里·奎因更名为罗伯特。
不过情节依然忠实于原著，并获得了当年日本学院奖和电影旬报奖（都是女配角奖，获奖者为小川真由美），该片首映时，丹奈（奎因两兄弟之一）还专程赶到日本出席仪式
For the study of Japanese culture, the Pope came to the United States youth Yamaguchi Di Tang Zeguang political home town. Karasawa home has three very beautiful daughters: the eldest daughter Lizzy, has an independent life; second daughter Noriko, whose fiance Fujimura before the marriage ceremony three years ago, suddenly disappeared; third daughter Keiko, has engaged with local prosecutors Minegishi, temporary help Pop research work.
《没有寄出的三封信》电影剧本。野村芳太郎。花开彼岸，枉自彷徨——记野村芳太郎《信札疑云》。
