Ling Xi, a top killer code-named "Bianganhua", passed away after her death and became the 13-year-old legitimate daughter of a general's mansion in another world. Faced with the vicious plot of the inner house and the enemy's conspiracy to overthrow the country, she saves the world with a silver needle in her left hand and eliminates evil with a sharp knife in her right hand. From the epidemic in the border town to the turmoil in the court, she used killing methods and a protective heart, and eventually became a legend in protecting the country.
