Over the long years, she has witnessed joys and sorrows, and loneliness has always lingered in her passionate heart. She, who seemed indifferent, finally had warmth at her fingertips. However, after an accident, in order to increase her strength to protect important people, she decided to retreat. Unexpectedly, this decision indirectly led to the separation of her junior brothers and sisters for twelve years.
After leaving seclusion, he came to the present world and searched for the whereabouts of his junior brothers and sisters alone. On the way, he met many strange people and went on adventures with them. However, there is a dangerous whirlpool hidden in the seemingly smooth journey. She gradually discovers some clues and tries to clarify the truth of the accident.