Su Yin has been estranged from the world since he was a child and loves to collect forgotten handwriting and fragments. Occasionally, an unknown volume of manuscripts led him to the ancient northern city - a quiet place that no one knew about. There are strange stories circulating in the city about time standing still and memories flowing backwards. Every blue brick and stone alley hides unspeakable secrets. Su Yin gradually pursued the investigation and found that the lives of the city residents seemed to be guided by some soft and invisible force, day after day, but no one noticed it. The loneliness and curiosity in his heart drove him to explore the truth, but along the way he met a group of people who were also lost in the past. As a sealed ancient oath gradually emerges, Su Yin must make a choice between preserving the gentleness and tranquility of the city or uncovering the truth of history. The story depicts the intersection of memory and reality in light colors, with glimmers and ripples hidden in the indifference. The secret of the ancient city is not only related to time, but also to the softest corner of everyone's heart.
