Kévin and Patrick are kidnapped and held hostage by a local mafia baron. Despite threats from their captors, the two men manage to reach an agreement and decide to collaborate. To do this, Agent Martini calls on Stéphanie, his personal psychologist, who agrees to put her life in danger by disguising herself. She goes to the majestic Irina, suspected of being the mastermind of a gang of Russian killers, who puts her to the test in order to verify her power of seduction towards men...