She was born with a pale pink birthmark between her eyebrows. It was her mother's last protection for her, so that she could be recognized by her beloved at a glance after being reincarnated hundreds of years later. Her life was originally ordinary, but her destiny was strangely rewritten, and she traveled between the past and reality. She encountered an accident involving love and hate, solved the mystery of her life experience, and saved her past life. However, saving the past means that she will no longer exist in the present. How will she choose in the end, the love of the present or the eternal alliance of the past?