Hagar of the Pawn-Shop is a collection of interconnected mystery stories centered around Hagar Stanley, a young Gypsy woman who inherits her miserly uncle's pawn shop in London. As she delves into the odd assortment of objects that pass across her counter, Hagar uncovers one mystery after another, each linked to a different crime or act of human deceit. With her sharp wit and intuitive nature, Hagar investigates these cases, sometimes independently and sometimes alongside the police, to unravel the webs of wickedness she encounters and ensure that justice prevails. The stories explore themes of crime, fraud, human nature, morality, and justice, while showcasing Hagar's strength, independence, and unwavering determination to uncover the truth.