As the nation attempts to rebuild following the destruction of the Civil War, Cornelius Vanderbilt is the first to see the need for unity to regain America's stature in the world. He sells his shipping empire to invest everything in the railroads, knowing they're the best chance for uniting East and West as never before.

Kerosene is lighting America after dark in unprecedented ways. The demand for oil is sky high, and Vanderbilt knows that oil can fill his trains. He turns to a young maverick oilman from Ohio, John D. Rockefeller, to do just that.

Andrew Carnegie immigrates to the United States with his parents and starts working at age 12. He finds a patron in railroad executive Tom Scott who teaches him about the business. By the time Carnegie is 30, Scott hires him to build a bridge over the Mississippi river to link East and West in a way never before thought possible by train. Carnegie agrees, but doesn't know how he'll build a bridge strong enough. Carnegie's doubt is quelled when he finds his answer in steel. Before Carnegie realizes the full potential of steel, his mentor Scott dies in a state of humiliation at the hands of John D. Rockefeller's oil pipeline. Carnegie vows to have his revenge and best Rockefeller.

Carnegie hires a hatchet man, Henry Frick, to help him achieve his goal of besting Rockefeller. The partnership seems promising, but Carnegie does not know that Frick is running his factories far beyond capacity. Frick cuts corners, and soon the pair is responsible for the biggest manmade disaster America has ever seen: the Johnstown flood, which claims more than 2,000 lives. Carnegie hates being disliked, and his initial impetus to seek revenge becomes the furthest thing from his mind.

While Carnegie and Rockefeller continue to battle, JP Morgan arrives on the scene and establishes a bank in New York City that has one goal: to further the technological advancements of America. Morgan's first investment is in Thomas Edison's new development--electric light.

With an investment from Morgan, the Edison Electric Company is created and begins wiring homes in New York. A rival, Nikola Tesla, soon emerges with a different technology for electric light. Edison is convinced his is better and goes to war with Tesla. As things escalate, Morgan begins to lose faith. Eventually, Tesla's technology prevails, and his theory of Alternating Current (AC) becomes the standard. Morgan fires Edison and renames Edison Electric Company as General Electric (GE). GE is still one of the biggest companies in the world today. Edison vows never to work with electricity again. He begins work on his motion picture camera.

Vanderbilt, Rockefeller, Carnegie, and Morgan have gone unmonitored for decades, but American politicians are about to change that. They want these men to fall into line under government control. The men, some lifelong enemies, come together with a plan to buy the White House by donating the modern day equivalent of $30 million dollars to Ohio Governor, William McKinley. McKinley intends to repay his backers; he repeals regulation after regulation to allow them the freedom to do unimaginable things without consequence or impediment. Morgan and Carnegie create US Steel, the first billion dollar company while Rockefeller takes control of 90% of North American oil.

A young engineer named Henry Ford devises the plan for a gas-powered car. McKinley is assassinated, and his VP Theodore Roosevelt takes office and quickly passes a series of regulations increasing oversight of American business. Ford receives his financial backing and comes up with the concept of the assembly line. He targets the middle class with his new product and changes the landscape of America. Rockefeller is put on trial for anti-trust violations. He loses in court and his company, Standard Oil, is one of the first monopolies broken up by the US government. JP Morgan helps to establish the Federal Reserve. This cements Morgan's legacy as the father of modern capitalism. As the US army sets sail for Europe, one thing is clear... these men didn't discover America. They built it.