Series One
A badly beaten body of a young Romanian woman is discovered on a Parisian rubbish dump. Her identity and past life are gradually uncovered as the various parts of the French Justice System investigate her death. However, it becomes apparent that her story is tied to a network of corruption touching the very people charged with uncovering the truth about her.

Series Two
A burned corpse is found in the boot of a car in a seemingly isolated case of urban violence. However, the case grows in complexity and danger as each new piece of evidence unearths a duplicitous world of international trafficking, informers, double lives and arms dealing. An audacious plan to strike at the heart of the crime network means that the slightest slip will result in certain death.

Series Three
When the mutilated body of a young woman is found on a disused railway track in the North of Paris, Police Captain Laure Berthaud seizes the opportunity to restore a tarnished reputation leads her squad on the hunt for what she believes to be a deranged serial killer. However, with her personal life in tatters and a potential rift emerging from within her own ranks, Berthaud's world is on the verge of disintegration.