皮埃尔·吉列斯在巴黎犯了谋杀罪。他逃到了巴塞罗那，在那里把钱用光了。因此，他加入了西班牙外国立法机关。他在那里遇到了两个同胞，穆洛特和卢卡斯。他试图掩盖自己的罪行...但是卢卡斯的友谊很快就显得不那么无私了。

维克多（让·迦本 Jean Gabin 饰）是一名拳击教练，一次偶然中，他结识了名为安德烈（罗兰·勒萨弗尔 Roland Lesaffre 饰）的拳击手，安德烈虽然没有接受过拳击训练，但维克多发现他的身上隐藏着无限的潜能。维克多的妻子并不希望丈夫继续再待在这个充满了暴力和血腥的行业中了，当了解到了维克多太太的苦衷后，安德烈决定暗地里输掉比赛。
然而，命运将一个名为科琳娜（Marie Daëms 饰）的女人送到了安德烈的身边，让他深深的为她着迷，爱情使安德烈充满了力量，于是他取消了原定的计划，最终赢得了比赛。然而，很快维克多就发现，科琳娜的存在成为了安德烈职业道路上的绊脚石。

Six months before his retirement from the criminal police, inspector Joss finds his colleague Gouvion dead, in a poorly faked suicide attempt. Joss loses his temper, and investigates on his own, which leads him through the bas-fond of Paris.

在圣巴勃罗海滨，一场醉酒狂欢后，鲍勃担心他可能杀害了一名男子，由于不确定，他需要到孤立的船上找一份工作。那天晚上，他救了企图自杀的安娜并把她带上了船。但是鲍勃的伙伴Tiny想驱逐安娜，担心她会破坏兄弟之情，而尚未解决的谋杀悬疑正是Tiny所需要的借口，海面上四伏着浓雾与邪恶...

A parentless young boy Alain Robert is placed into the care of a rural farming family. Bullied and abused, he sets fire to a barn and runs away to the town. Alain allows himself to be placed into the custody of Judge Lamy, who arranges for him to be sent to an observation centre for juvenile delinquents in the country. Here, Alain strikes up a friendship with an older boy, Francis, who is determined to escape so that he can rejoin his pregnant girlfriend…
Chiens perdus sans collier is director Jean Delannoy's rare attempt to tackle real social issues, although he is noticeably less successful than in his other films. This is in spite of the fact that the film is competently made and features some creditable acting performances. The film looks good, it makes entertaining viewing, but it just doesn't ring true.
The film's evident artificiality made it a sitting target for the reactionary film critics of the time, most notably François Truffaut (who would develop an intense hostility towards Delannoy in later years). Chiens perdus sans collier is certainly a good example of the uninspired kind of film which French cinema churned out in the 1950s, although it is not in itself necessarily a bad film.

一个狡猾的骗子说服金盆洗手的骗子-现在是有名望的商人干最后一票，一切顺利进行之时，对手的团伙也想分一杯羹......

应圣菲阿克伯爵夫人的要求，警察局长朱尔斯·迈格雷特回到了他度过童年的小村庄，她收到了一封令人不安的匿名信。

来自美国的黑帮分子试图杀害一名关键的政府证人，该证人的证词可能会帮助一名有影响力的黑帮分子入狱。这取决于侦探Maigret与联邦调查局和一系列黑社会人物打交道，以挽救证人的生命。。。