La Chèvre

An imposing private detective specializing in disappearances, Campana is used to being in charge and approaches the case with professional skepticism toward Perrin's luck-based plan. He navigates a string of setbacks with a mix of frustration and stubborn resolve, insisting on a practical path to finding Marie. The dynamic with Perrin tests his authority, yet he remains committed to solving the case.

An accountant whose life is a long history of mishaps, Perrin is cast as the 'unlucky' candidate. He undertakes the investigative role with earnest seriousness, embracing the plan despite the premise that luck governs outcomes. His misfortune repeatedly yields unexpected clues and forces Campana to adapt, fueling the film’s comic tension.

Marie Bens is the CEO's daughter who is kidnapped while on vacation in Puerto Vallarta. Her kidnapping motivates the investigation, and she ultimately appears alive near Perrin in an infirmary, underscoring the high stakes and resilience of the characters involved.

Marie’s father and CEO, Alexandre Bens pushes for results after the kidnapping and funds and guides the pursuit. His desperation and pragmatism shape the pressure on Campana and Perrin, influencing the decision to pursue unconventional methods.

Arbal is the initial kidnapper whose actions drive the chase. He is eventually shot dead by his own gang to prevent him from speaking, marking a turning point in the investigation and shifting focus to the gang’s leadership.

The company psychologist who identifies Perrin as the perfect 'unlucky' candidate. Meyer orchestrates the plan to harness Perrin’s misfortune and influences the early direction of the investigation, acting as the strategic brain behind the unusual approach.