The narrative begins in Philadelphia, where a young and unusually astute Frank Cowperwood observes a brutal struggle between a lobster and a squid in a fish market tank. This early sight serves as his philosophical foundation: life is a struggle of the strong consuming the weak. Growing up during an era of wildcat banking and rapid economic expansion, Frank quickly absorbs the mechanics of finance by visiting his father at the Third National Bank and engaging in his own shrewd business ventures, such as buying and reselling auction goods.
As he matures, Frank enters the stock brokerage world, first working under the grain and commission firm of Waterman and Company, and later joining Tighe and Company. He quickly realizes that brokers are merely gamblers' agents, while true power belongs to the men who control the foundational assets, railroads, and industries. Through audacity, precision, and an intuitive understanding of the market, he builds his own capital and reputation, navigating the financial turbulence of the antebellum period and the Civil War.
Frank's personal life mirrors his professional ambition. He marries Mrs. Semple, an older widow, drawn to her statuesque beauty and the social elevation her property provides. However, his unyielding drive for dominance and his appetite for life remain unsatisfied. He soon embarks on a passionate, clandestine affair with Aileen Butler, the fiery daughter of a powerful and wealthy local contractor, Edward Butler.
Capitalizing on his growing reputation and a strategic connection with the corrupt city treasurer, George Stener, Frank orchestrates a lucrative bond deal with the state government. This success propels him into the upper echelons of financial and political power. He builds a magnificent home alongside his father and establishes his own prestigious banking house, Cowperwood and Company, positioning himself to command the city's financial landscape.
The story traces the absolute alignment of Frank's internal philosophy with his outward actions. He remains entirely untouched by conventional morality, viewing laws and societal norms as mere tools to be navigated or bypassed by the strong. His ambition expands toward controlling the city's emerging street railway systems through intricate and highly questionable financial manipulations with public funds.
As the narrative progresses, Frank's entanglement with political insiders and his brazen confidence set the stage for future reckoning. The sheer scale of his operations, combined with his clandestine affairs and disregard for established boundaries, creates a precarious foundation. The novel portrays a man intoxicated by his own competence, hurtling toward a destiny where his immense ambition will inevitably clash with the very system he seeks to exploit.