Yun Xia a master is back from the past where she is still ten years old. Years of her experiences make her a cunning and dangerous person but at the same time, she is a very kind and happy person.

This is the story of a girl who is very cheerful and innocent but at the same time deadly and brutal person. Making to correct her regrets from her future self, saving her loved ones. Creating schemes behind the scenes for her amusement, what future Yun Xia will make together with the person around her?