In the twentieth century BC, the land of Huaxia was falling apart amid the turmoil of the Xia Dynasty's collapse after King Tai Kang lost his kingdom. Han Zhuo murdered the king and usurped the throne, while Shao Kang fled into exile with the Youyu clan. Beneath the surface, plans to restore the kingdom were taking shape. Amid the blood-soaked shadows of the changing powers, an ordinary woman, Nü Ai, quietly stepped onto the stage of history.
Nü Ai appears in only a few ancient texts, and neither historical records nor archaeology offer any trace of her. Born into the Youqiong tribe, she was chosen by Shao Kang for her exceptional courage and intelligence, becoming a key figure in turning the tide. She shed her feminine finery and became a blade hidden in the dark. Disguised as a condemned slave of the Youqiong, she infiltrated Han Jiao's territory and deciphered secret pottery tablets by lamplight in the dead of night. Amid the clamor, she tracked the enemy army's movements, turning every oversight into vital intelligence. The Youqiong tribe, represented by Nü Ai, and the Xiahou clan, represented by Shao Kang, were bound by hatred, both personal and national. Nü Ai later helped Shao Kang restore his kingdom and destroy the Han regime. Nü Ai became the founding ancestor of the Ai surname, and her descendants used the eagle totem as their tribal emblem, carrying it on for a thousand years. She was the night hawk lurking in the enemy camp, and the most secret pair of eyes and ears at Shao Kang's disposal.
Yet neither historical sources nor archaeological discoveries have uncovered any record of Nü Ai's deeds. This story uses a purely classical Chinese narrative structure in an attempt to reconstruct the true face of history. Through the story of Nü Ai, it extrapolates the development of early espionage in ancient China.