The story follows two simple-minded drifters, Manu and Jean-Gab, who are hired to deliver a mysterious briefcase for a quick payout. Their simple mission is derailed when they discover a —the size of a large dog—trapped in the trunk of their stolen car. Rather than being horrified, the duo names the fly "Dominique" and decides to train it to rob banks, believing this will lead them to easy wealth. : They are mistaken for old friends by