In a world ruled by patronage and privilege, a young postal clerk with unique skills, integrity, and tireless work ethic, catches the attention of powerful men in Washington DC - beginning a rise through the machinery of American power, not by connections, but by merit.

Now Private Secretary to President McKinley, Cortelyou proves indispensable during the Spanish-American War. But his resolve is truly tested when McKinley is shot by an assassin at the World’s Fair in Buffalo, New York. New inventions are considered to aid the president, such as Thomas Edison’s “X-Ray”. As the country reels from McKinley’s death, Cortelyou holds the government and the grieving First Lady - together.

With Theodore Roosevelt’s sudden rise to the presidency, Cortelyou becomes the stabilizing force behind the most energetic administration in history. From modernizing the White House to managing the southern backlash after the president dines with Black leader Booker T. Washington. And when her father unexpectedly became president, the spirited teenage Alice Roosevelt moved into the White House with her new celebrity status, attracts public attention for her rebellious behavior. 

Roosevelt takes on JP Morgan and America’s most powerful monopoly in the Supreme Court. Cortelyou is tapped to build a new arm of government from scratch. The First Lady oversees the modernization and expansion of the White House, including the creation of the West and East Wings. The episode concludes among the Ponderosa Pines of Yosemite Valley, where President Roosevelt spends several days camping with famed conservationist John Muir - setting the stage for America’s expansion of the National Park System.

Cortelyou reluctantly agrees to manage Roosevelt’s 1904 reelection campaign. Despite his reputation for integrity, he becomes the target of press attacks for accepting large donations from big businesses. Tensions rise when Cortelyou, offended by the President’s insinuations, pointedly reminds him: “Everything you write down goes to history.” Meanwhile, Roosevelt’s daughter Alice marries a prominent politician who is 15 years her senior. The wedding, held at the White House, draws hundreds of the nation’s elite and becomes the most celebrated social event of the year.

Lilly Cortelyou and Edith Roosevelt’s shared concerns over immigration policy reach a breaking point when Edith visits Ellis Island and witnesses the harsh, invasive questioning of female immigrants by male officials. At the time, Ellis Island served as America’s primary federal immigration processing center from 1892 to 1954 - the first stop for more than 12 million hopeful newcomers seeking a fresh start. Meanwhile, Cortelyou’s own journey takes a dramatic turn. Once a humble postal clerk, he rises to become Postmaster General and launches an ambitious effort to modernize the nation’s aging mail system. He champions the introduction of automobiles to speed delivery and takes a struggling young clerk under his wing, offering him a second chance.

As the economy wobbles under the weight of reckless speculation and unchecked corporate power, a full-blown panic erupts on Wall Street in October 1907. A run on the banks spreads nationwide. There’s no Federal Reserve, no deposit insurance - just fear and collapsing confidence. While Roosevelt is away, Cortelyou, now Secretary of the Treasury, meets with J.P. Morgan, John D. Rockefeller, and other financial titans tackled the crisis head-on. Yet, just as Cortelyou’s star shines brighter than ever, his nine year old daughter, Hazel, dies suddenly from diphtheria.