Günther Wallraff assumes the identity of a Turkish man named Ali Sigirlioglu. He opts to disguise himself for his experiment. He alters his appearance by wearing contact lenses and a wig to make himself appear younger, and additionally adopts what he considers to be a stereotypical cartoon accent and affect. Wallraff publishes an ad in a newspaper as Ali Sigirlioglu, stating his willingness to work any job, including hard labor. He takes on various jobs as an unqualified worker, including work as a farmhand, a McDonald's fast food worker, and an emergency response worker in a nuclear power plant. Wallraff concludes his undercover experiment after two years as a result of the physical strain and health problems the various jobs caused him.
—Ulf Kjell Gür