HISTORY makes waves with Great Lake Warriors. For more than 150 years, the Great Lakes has served as one of America's busiest commercial waterways, connecting East Coast ports to America's heartland. Heavy raw materials that build America, like iron ore, are transported in giant barges, guided by tugs. Without which commerce would slow. We follow a maverick American tug boat company as they haul materials between October and January - the most treacherous time of the year. They navigate storms and ice-choked passages, go on ice-breaking missions to free trapped ships, and collide with ships they are pulling. As one of the only independent tug companies, the crew must take huge risks on the ice or go out of business. The dangers are real and the tensions run high on Great Lake Warriors.