A widow (Michele Morgan) in a small town begins to realize that her late husband was hated by nearly everybody. She begins to receive blackmail letters that threaten to further humiliate her if she does not pay up. She enlists the help of Franz (Robert Hossein), a man who was once fired by her late husband, to track down the source of the letters. She becomes unhinged and eventually tries to kill the man who is helping her in this early example of a Giallo.

樱花动漫网友评论：饭点配着看的 黑眼圈[电影解说]，没想到还真看进去了。有瑕疵但不影响整体观感，再加上越到后面越顺。还有就是看着不累，这点我很喜欢，再加上不是那种空喊口号的感觉。情绪给得比较自然，不是尬夸，真还行。看完挺踏实。