A crazy sniper terrorizes all of Paris by opening fire on crowds. The city is on red alert. After two murderous gunnings, Chloe and Rocher succeed in identifying the killer: Adrien Fontel, a former military agent of the Special Forces destroyed by what he lived through in Afghanistan. Chloe diagnoses him as suffering from Capgras Syndrome, a psychiatric condition in which the patient believes that people around him are gradually being replaced by villainous doubles preparing to enact evil plans. Convinced he is on a mission to fight these invaders, Fontel kidnaps his …