The unsuccessful actor and notorious ladies’ man Grégoire Lecomte is heading for a casting hoping to land the role of a hitman in a new comedy.

His goal is to use the paycheck to settle debts — unpaid fines from the road police and outstanding repair fees to a service company for plumbing issues (the latter is revealed through a voicemail message from a plumber threatening legal action).

Don Barberini gives him a 50,000-franc advance and sends him to Saint-Tropez to eliminate Otto Krampe, nicknamed "Whale," a weapons dealer accused of selling faulty arms to an African leader.

Salvatore Bozzoni, Don Barberini’s associate, equips Grégoire with a murder weapon — an umbrella containing a built-in syringe full of potassium cyanide.

Meanwhile, the mafia is under surveillance by criminal police and counterintelligence agents, who struggle to determine Grégoire’s role in the unfolding events.

He then hires Moskovitz, a professional assassin with an unrecognizable face due to multiple plastic surgeries, and sends him to Saint-Tropez to clean up the mess.

She kills Moskovitz with a precise shot and reveals her true identity as a criminal police officer tasked with eliminating Krampe.