MS of a steel worker removing a sample of steel to be tested in the laboratory. CU of him hammering it to shape. MS of a scientist testing and analyzing the steel sample. POV of steel under a microscope. MS of scientist setting up machinery to test strength of the steel sample. CU of steel being stretched. CU of a mini furnace being used in the lab. MS of a worker rubbing a sheet of stainless steel. CU of steel workers at the end of the day, going home. MS of people walking home. CU of a worker, outside dressed casually. MS of the man approaching his family and car. MS of cars at an intersection. VO of narrator describing the process and how essential iron is to a vast network of human industries.