The female protagonist, Su Yurou, travels back in time to become the magistrate of Chen County in the Great Chu Dynasty, promoting women's rights laws and governing effectively. Emperor Chu Li and Prince Chu Chen visit, deeply impressed by her innovative ideas and black technology. Su proposes uniting women to counter the treacherous prime minister and saves the emperor from an assassination attempt using a homemade Gatling gun. When the prime minister's son leads an army of thirty thousand to attack Chen County, Su, with the help of the Women's Federation and her black technology, defeats the army with just a few hundred people, gaining widespread fame.
