Mr. Jo, often known as "the man with the Buick," is a local favorite in Honfleur. However, he is actually a notorious drug trafficker who wishes to put his past behind him. He now restricts himself to smuggling rubies while posing as a nonprofit that arranges vacations for disadvantaged kids in Switzerland. However, Mr. Jo is in love with a lovely widow and is prepared to take part in another heist in order to marry her. When Inspector Menard exposes "the man with the Buick," who appeared so decent, the Honfleur residents will be shocked.