The bell tower of the ancient city rang the thirteenth time every night, and Shi Yao woke up in the mist. Her memory was like a broken shadow, and only a rusty copper key hinted at the possibility of escape. This city has bluestone paved roads, secret alleys hiding mysteries, and the shadowy residents seem to be waiting for some unspeakable secret. Shi Yao is not an ordinary girl. She is the "Watcher of Time" in a lost city, but she is imprisoned in an endless cycle because she refused to sacrifice herself and broke a century-old covenant. With each restart, deeper mysteries emerge from the cracks in the city wall - who is the weaver behind the scenes? Why is all time directed towards her? Shi Yao travels through the broken time and space, trying to piece together her own truth and break free from the shackles of fate. Under the enchanted ancient city, time and memory are intertwined into a web, and the girl's resistance and loneliness will ignite a glimmer of self and freedom.