In French with English Subtitles at the beginning of the third season of this gritty French police thriller, the mutilated body of a young woman is found on an abandoned railway track. Police Captain Laure Berthaud sees the case as an opportunity to restore a tarnished reputation and leads her squad on the hunt for what she believes to be a deranged serial killer. Meanwhile, Judge Roban investigates a bribery scandal involving a prominent political figure.