The Sicilian(1958)

A brave little couturier from Lyon, Fernand, travels to Paris to present his creation "La ligne Impériale" to a major fashion house. Following a misunderstanding, he is mistaken by a gang of gangsters for "Le Sicilien", a hired killer. A quid pro quo of enormous proportions. Fernand has the whole gang arrested and is reunited with his sweet fiancée Josée.