Protagonist; a former psychologist turned road safety trainer who secretly hunts and kills dangerous speeding trainees at night to prevent further accidents, while simultaneously seeking revenge on the hit-and-run driver who killed her partner.
Kervella targets Pauline as the central figure in the crash investigations.
Giordano actively pursues Pauline as the vigilante killer.
Lapick coerces Pauline into criminal activity through blackmail and surveillance.
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