Málaga, southern Spain. Seven men, divided into four cars, set off with a large drug shipment towards Creil, a city near Paris; a routine mission that will be complicated by a fatal sequence of events.

Marion Reynaud, qui prépare son concours d'inspecteur, voue une admiration sans borne à son supérieur, Gabriel Carré, un commissaire respecté. Kancel, un dangereux caïd, réussit à s'évader tandis que sa bande enlève Gabriel sous les yeux de sa femme Françoise. Celui-ci est séquestré au sous-sol d'une immense villa. Kancel veut arracher à Gabriel le nom de celui qui l'a dénoncé trois ans plus tôt. Alors que celui-ci refuse de lui donner la moindre information, une bataille psychologique commence entre les deux hommes...

A Parisian criminal gang fall apart after challenges to the gang's leader lessen his influence.

From his offices in Switzerland, Russian Igor Lipovsky is engaged in a vast and profitable gunrunning operation with Africa. The French government wants to hinder the activities of the arms dealer and sends a team to sink one of his ships heading for Angola with a load of illegal weaponry. Lisa, Brisseau, Loïc, Tony and Raymond are professionals: they carefully set up their cover, plan all their moves meticulously, and carry out orders without asking questions. Perhaps they should. The code-name of the mission is "Janus"; and just like with the ancient deity, there are two opposite faces for every aspect of the operation: the objective of the French government, the role of each team member, the presumed friend and the assumed foe...