讲述了发生在西北偏僻村落的一桩意外死亡案件，由此牵扯出一系列突如其来的杀人案和“嫌疑者”：村医刘新申、心理学高材生刘云、与刘新申再续前缘的妻子康晓燕、意外毙命乡野路头的陈全、与陈全素有积怨的村民等，到底谁是悬案凶手？主角、村医刘新申经历两次道德拷问的人生又将作出怎样的抉择？影片着眼人性的良知与私欲，探讨生命的意义与价值。

Fraught with over obvious symbolism, Hartley's early feature is nonetheless a joy to watch. Hal here shows us his uncanny ability to cast his characters perfectly came early in his career.Adrienne Shelley is a near perfect foil to herself, equal parts annoying teen burgeoning in her sexuality (though using sex for several years); obsessed with doom and inspired by idealism gone wrong she is deceptively – and simultaneously – complex and simple. Her Audrey inspires so many levels of symbolism it is almost embarrassingly rich (e.g., her modeling career beginning with photos of her foot – culminating her doing nude (but unseen) work; Manhattan move; Europe trip; her stealing, then sleeping with the mechanics wrench, etc.)As Josh, Robert Burke gives an absolutely masterful performance. A reformed prisoner/penitent he returns to his home town to face down past demons, accept his lot and begin a new life. Dressed in black, and repeatedly mistaken for a priest, he corrects everyone ("I'm a mechanic"), yet the symbolism is rich: he abstains from alcohol, he practices celibacy (is, in fact a virgin), and seemingly has taken on vows of poverty, and humility as well. The humility seems hardest to swallow seeming, at times, almost false, a pretense. Yet, as we learn more of Josh we see genuineness in his modesty, that his humility is indeed earnest and believable. What seems ironic is the character is fairly forthright in his simplicity, yet so richly drawn it becomes the viewer who wants to make him out as more than what he actually is. A fascinatingly written character, perfectly played.The scene between Josh and Jane (a wonderful, young Edie Falco . . . "You need a woman not a girl") is hilarious . . . real. But Hartley can't leave it as such and his trick, having the actors repeat the dialogue over-and-over becomes frustratingly "arty" and annoying . . . until again it becomes hilarious. What a terrific sense of bizarre reality this lends the film (like kids in a perpetual "am not"/"are too" argument).Hartley's weaves all of a small neighborhood's idiosyncrasies into a tapestry of seeming stereotypes but which delves far beneath the surface, the catalyst being that everyone believes they know what the "unbelievable truth" of the title is, yet no two people can agree (including our hero) on what exactly that truth is. A wonderful little movie with some big ideas.

电影分为三个短片，每个短片中的主人公都叫小百。《门底下的脚影子》：某日，五岁的小百偷看到了父母吵架的场面，成年人之间的争吵斗气，在天真单纯的孩童眼中又会是一番怎样的景象呢？《遗失的身份证》：日复一日的平淡生活让十七岁的高中生小百（曾甜甜 饰）感到十分厌倦，某日，她邂逅了一位没有过去的男子，两人决定体验一下“他人”的生活，两人都没想到的是，这突如其来的念头，竟然带来一段充满了惊现和刺激的经历。《游牧民族》：三十岁的小百（舒淇 饰）整日无所事事，感情居无定所，在又一次失恋后，她回到了母亲身边，两人开始了一段意味深长的同居生活。

张坚庭父亲因迷信，禁张三十岁前结交异性。郑文雅本为死人化妆师，为交男友改习新娘化妆。本爱情喜剧片由陈友与张坚庭之二友电影公司制作，陈友自导自演，张坚庭自编自演，并撮合三代影星，1979年及1982年香港小姐冠军郑文雅及梁韵蕊、70年代红星胡锦及黄淑仪、60年代反派之王姜中平等合作。故事描述，美术设计师张坚庭家祖上风水怪异，男子三十岁前结婚，会被妻子克死，张父姜中平遂严禁张结交异性；但张以限期将届，急不及待觅对象。郑文雅与母胡锦同为死人化妆师，为交男友改习新娘化妆；张与郑遇上即过从渐密…