Shen Biluo died with hatred, and for some reason she became a ghost detained in an unknown place. A long time passed, and she forgot herself and her hatred. She didn't know why she existed in the world. Finally, she turned into a spirit body and was transformed into a sword spirit. She didn't know how long the days had passed, but the reason for her existence now was to protect that girl and her home. This was the mission of Biluo Sword, and it was also what she, Shen Biluo, wanted throughout her life.