Nezuko was a normal girl, she lived with her family, she was happy before she became a demon, Nezuko loved her mother and her brothers, but until one night when her older brother Tanjiro didn't come back to home, Nezuko and her brothers and mother were attacked by a demon, and Nezuko had become a demon, and lost all memory, but now she is safe with her brother Tanjiro and fights against the demons, Nezuko's older brother is looking for a way to bring Nezuko back to being human again.