In ancient times, there was jade, named "Guixu", which held the secrets of time and space. It was broken into pieces in the ancient times and scattered in various dynasties. It was transformed into four people's personal tokens - Xi Shi's Huansha Handkerchief (dyed with the spirit of crossing the water), Wang Zhaojun's Pipa string (condensing the light of the Han moon), Diao Chan's jade hairpin (reflecting the star of the Eastern Han Dynasty), and Yang Yuhuan's golden step shake (inheriting the wind of the prosperous Tang Dynasty). On the night of the lunar eclipse, four stars connected and the tokens resonated. The four people from their respective eras were involved in the turbulence of time and space, and fell into "Yong'an Town" - a space-time gap nourished by the fragments of the Guixu Jade. It is not a simple transfer station, but a secluded place for the "time-space corrector", hiding conspiracy and redemption that spans thousands of years.
