Following the collapse of the "Île de la Cité" in the 70s, the center of Paris was transformed into an opaque zone where crime prevails over the law. Known as "la Fosse", this ghetto abandoned by public authorities has become a factory for psychopaths.
In this dystopian Paris reminiscent of Gotham City, Ariane, a cop with unorthodox methods, chooses to team up with Marsault, a psychopathic subway driver, to find her husband and dismantle a pedophilia network. She soon realizes that the mads attract the mads...
