Her Country with a Thousand Years of Resentment

She is a ghost in a chaotic time and space, with no memory of her past life. Like an elf, she appeared in front of another person who looked exactly like her. In this world, she helps her as a ghost retrieve her memory and help her soul be liberated. The journey of liberation of girls and female spirits. Who is he? A mysterious and huge family lives in the city, but no one knows his true identity. What kind of conspiracy will the noble sons of the four major families have?