A first-person narrator becomes embroiled in a criminal investigation that merges detective work, an unexpected romance, and the rise of a populist labour movement led by a mysterious, magnetic figure known by a diminutive sobriquet. The narrative follows sleuthing through opium dens and private clubs, burglaries, secret identities, and mesmerist tricks, with disclosures that shift loyalties and reveal hidden pasts. As tension escalates into street warfare, the city convulses with insurrection, pitched battles, and civic upheaval, bringing personal reckonings, confessions, and a decisive confrontation that reshapes relationships and authority.