"Moriarty the Patriot" is a reimagining of Arthur Conan Doyle's Sherlock Holmes stories, centering on William James Moriarty as the protagonist. Set in late 19th-century Britain, the series explores the rigid class system and societal inequalities of the era. William, a brilliant mathematician and nobleman, adopts the alias of a consulting criminal to dismantle the corrupt aristocracy from within. Alongside his adoptive brothers, Albert and Louis, William orchestrates elaborate schemes to eliminate oppressive figures, presenting their deaths as accidents or suicides. The narrative positions Moriarty as a morally ambiguous figure, driven by a desire to create a more just world, even if it means resorting to extreme measures.

The story unfolds in two main arcs. The first arc, set during William's youth, delves into his backstory and the origins of his vendetta against the aristocracy. Born into poverty, William is adopted by the Moriarty family, where he witnesses firsthand the cruelty and exploitation perpetuated by the upper class. This fuels his resolve to challenge the status quo. The second arc follows William as an adult, where his plans grow increasingly complex and far-reaching. His actions attract the attention of Sherlock Holmes, a brilliant detective who becomes both his intellectual rival and a foil to his ideology. Their dynamic is central to the narrative, as Holmes seeks to uncover Moriarty's true motives while grappling with the moral ambiguity of his methods.

Key characters include William James Moriarty, the mastermind behind the schemes; Albert Moriarty, the eldest brother who supports William's vision; and Louis Moriarty, the youngest brother who handles the logistical aspects of their operations. Sherlock Holmes serves as the primary antagonist, embodying the pursuit of justice through lawful means. Other notable figures include John Watson, Holmes's loyal companion, and Irene Adler, a skilled actress who becomes entangled in Moriarty's plans. The series balances intricate plotting with character-driven drama, exploring themes of justice, morality, and the consequences of radical change.