

Mr Jo, nicknamed "the man with the Buick", is the darling of the small town of Honfleur. But his true life is about trafficking. He tries to limit himself to smuggling rubies under the cover of a charitable organization which offers underprivileged children holidays in Switzerland. However, Mr. Jo is in love with a pretty widow and, in order to marry her, he is willing to get involved in a hold-up again. And "the man with the Buick", who seemed so honourable, will surprise the inhabitants of Honfleur when Inspector Menard reveals his secret activities.