The title translates as A Tremendously Rich Man, which indeed describes the financial condition of hero Curt Bois. Actually, all of Bois' assets are in his stomach: a jeweller's assistant, he has accidentally swallowed a valuable diamond. All sorts of misadventures befall the poor fellow until it is discovered that he hasn't ingested the gem at all, but instead a piece of rock candy. Leading man Curt Bois later emigrated to Hollywood where he appeared in dozens of small movie roles, most memorably the pickpocket in Casablanca. His career extended well into the 1980s, when he made his final film appearance in Wim Wenders' Wings of Desire.
by Hal Erickson synopsis