Time has a heavy texture here. The handwriting on the night watchman's diary, ranging from neat to scrawled, records not only observation data, but also the lonely questioning of "why to watch" by generations of people in the long night. Each of the names that are gradually increasing on the back wall of the base was once a living person. Their sacrifices are not light words, but heavy memories that are specific to their smiles, habits and unfinished wishes. Until the young man named Su Ran came "accidentally". His time travel is not accidental, but an inevitable echo in the thousand-year causal chain. When he began to use insights beyond his time to trace the truth about his classmates' coma, and when he and Lin Yu went from being alert to being side by side, the gears of fate began to slide in an unexpected direction. What he brings is not only a way to break the situation, but also a brand-new possibility: can guardianship no longer be a fate imposed by blood, but become a free choice made by individuals after deeply understanding all the costs? Deep in the earth's veins, Lin Yuan, the first-generation night watchman, has been guarding his obsession for eight hundred years alone; in reality, Lin Yu and Su Ran's silent dispute and mutual concealment about "who will become the anchor" are pushing this question to the final answer. This world is waiting quietly to see whether the thousand-year shackles will be extended by new sacrifices, or broken by some emotion and will that transcend fate. Lin Yu's trust, the two began to work together to explore the truth. They first found an ancient notebook in an abandoned old teaching building on campus. The notebook recorded a sacrificial ceremony that once took place on campus, which seemed to be related to today's bizarre events.
