After being fired from Aurelia—a top-tier New York restaurant—Harper Quinn unexpectedly crosses a mystical barrier and lands on the continent of Eldranox, a realm where humanity has long been extinct. The land is not a unified kingdom, but rather a collection of three distinct powers: the Moonveil Kingdom (ruled by werewolves), the Eternal Night Kingdom (ruled by vampires), and the Ancient Domain of Dragons (ruled by dragons). These factions interact solely within the neutral Free Trade City of Lunaris. Lacking any magical ability, Harper relies on her modern culinary skills, business acumen, and a "Fast-Food Tycoon" system. Starting with a single fried-chicken cart, she captures the werewolf market, introduces cola and coffee to the vampires’ nocturnal economy, and wins over the dragons with pizza, hamburgers, and construction materials. Gradually, she builds an empire—comprising chains like KKC and Moonbucks, along with food production facilities, warehousing, and a cross-continental logistics network. Her commercial expansion shatters the decades-long monopoly held by Silas Crow, head of the vampire Food Guild, and, for the first time, provides all three races with a shared consumer culture and a common set of economic interests.