Xia Youyou, a freshman in cultural relics and museum studies, is destined to form a blood contract with a mysterious ancient book on the eve of her freshman year.
Mountains and rivers are turning, stars are rising and falling, and when you open your eyes again, is it praise? Is it Mulan? Or Logan?
Who did she change? Who changed her again? And what is the secret and mission flowing in the family's blood?
