Annie, whose married life with Laurent is a picture of harmony. Her two young kids, Maximilien and César, are brilliant and sensitive boys, and Poupi, her teenage daughter, supports her willingly and patiently in bringing up Milo, her latest arrival. It’s a perfect family that Annie controls with a firm but loving hand. Yet one morning during an apparently uneventful weekend, the discovery of a forgotten positive pregnancy test left lying around in the bathroom shatters this harmony into a thousand pieces. Who does the test belong to As she embarks on a crazy investigation to find out the owner of this object, and despite her best efforts to save face, Annie will see all of her certainties turned on their heads, and the pack of cards that life has dealt her entirely reshuffled.

2012年，马赛北部地区是全法国犯罪率最高的地区。在上级领导的压力下，BAC Nord警队不断改进工作方式。在高风险地区，警察选择改变工作手段，有时甚至会越过界限。直到有一天，法律形势开始对他们变得不利……