In the early years of the Republic of China, Luna Yates defeated Harlan Grove with superior martial arts skills to become Number One Under Heaven. However, her flamboyant personality drew the attention of enemies who killed her father. Overcome with remorse, she sealed her own meridians, adopted the alias Luna, and hid as a menial worker at Full Spring Restaurant. Three years later, the Black Scorpion Gang came to harass the restaurant, coveting its wine recipe.