She is a stranger in the long river of time, her face remains forever, but her heart has gone through vicissitudes of life. From the bloody storms of the Warring States Period, to the tranquil medicinal fragrance of Yueling Cottage, to the cold wards of modern cities, Shen Ling spans thousands of years. She looked for the unchanging tenderness and protection in those familiar eyes - that was the mark of Ah Yue's soul. Every encounter is a reunion after a long separation; every companionship is a destined departure. She sent away Jing Ke's heroism, witnessed Ah Yue's aging, guarded the growth of Xing'er and Sui'er, and finally fulfilled the eternal promise of sending flowers again in front of Professor Lin's bed. This is about eternal loneliness, searching and watching across reincarnation, and it is the only anchor point that travelers on the other side of time can grasp in the endless drift.