The film tells the story of a young accountant (Herrán) on remand pending trial for embezzlement and possibly facing 10 to 20 years in prison, a disproportionate sentence for the nature of his crime. However, this is 1977 and inside the Modelo prison it is a case of survival of the fittest. Despite everything working against his acquittal, the young man refuses to dive up and joins a group of prisoners preparing to demand amnesty. If things are changing outside the prison, they must also change inside. This becomes COPEL, the Coordination of Fighting Prisoners.
八公（Forest 饰）是一条谜一样的犬，因为没有人知道它从哪里来。教授帕克（理查·基尔 Richard Gere 饰）在小镇的火车站拣到一只走失的小狗，冥冥中似乎注定小狗和帕克教授有着某种缘分，帕克一抱起这只小狗就再也放不下来，最终，帕克对小狗八公的疼爱感化了起初极力反对养狗的妻子卡特（琼·艾伦 Joan Allen 饰）。八公在帕克的呵护下慢慢长大，帕克上班时八公会一直把他送到车站，下班时八公也会早早便爬在车站等候，八公的忠诚让小镇的人家对它更加疼爱。有一天，八公在帕克要上班时表现异常，居然玩起了以往
