该片为1974年的经典恐怖片《德州电锯杀人狂》的前传电影。影片讲述四个精神病犯人从精神病院逃出，并绑架了一名年轻的护士，他们一起踏上了血腥残酷的旅程。追在他们身后的，是一对精神错乱的德州骑警。

Set during the Blitz in 1940s London. After writing twelve Poirot novels in six years, Agatha Christie should be a rich woman. Instead she’s struggling to make ends meet. As the money runs out, Agatha concocts a plan to kill off her most famous creation and sell the manuscript to a superfan. When Agatha’s would-be-buyer suffers a heart attack, it seems unfortunate but benign. When her manuscript is stolen, a wider conspiracy begins to take shape. As the bombs fall and she investigates, the danger of her situation becomes apparent; Agatha herself is the killer’s next target.

Mary来到一间加油站求职，她坦言自己因放火烧自己的男友而坐过牢，而事实上他的男友是个曾杀死过35个女人的连环杀人狂。在Mary上班的第一个夜晚，就又有新的受害者出现了。

根据80年代的电子游戏"它来自沙漠"改编，向1950年代致敬。本片的特色是沙漠、摩托车英雄和女英雄、沙漠中的派对、秘密地下军事基地...... 当然还有巨型蚂蚁。

As bombs fall on London, writer Agatha Christie decides it is time to kill off her most famous creation.