巴黎鲁贝区的圣诞夜。警队队长德奥在区内巡逻。目睹被烧坏的汽车，暴力打架…… 每日面对的都是贫困、欺诈和求救等状况，德奥一眼便知道谁是谁非。路易刚从警察学院毕业，加入了德奥的小队。路易年轻又没有经验，很容易被人误导，经常误解所遇到的人和事。德奥和路易接报调查一名老妇被谋杀的案件。老妇邻居的两个年轻女子歌迪亚和玛莉被捕。她们是瘾君子、酒鬼和恋人……...

Follows ten year-old Johnny who stands out in different aspects way beyond his age. Things change when his new teacher sees his potential, believes in him and wants to open a new world to him....