Lin Wei, a graduate student in the Department of Modern History, accidentally came into contact with the same ancient jade in the museum in order to check the documentation of the dragon and phoenix jade pendants of the Republic of China. When she opened her eyes, she turned into Ayu, a West Street apprentice in a small Jiangnan town in 1925 - the same little character who was passively involved in the dispute in the old drama "West Street Girl" she had watched.
The damp bluestone slabs on the West Street hide the flame of revenge of the brothel girl Su Wan; in the wealthy courtyard on the East Street, Shen Muyan's gentle eyes reveal her unwillingness to face class barriers. Lin Wei knew very well that in this dispute surrounding jade, the dragon and phoenix jade pendants were not only antiques, but also national treasures that were about to fall into the hands of foreign enemies.
With modern jade identification knowledge and historical memory, she is no longer the Ayu who is at the mercy of fate: she helps her shop expose the fake jade scam, teaches Su Wan how to use accounting methods to fix the evidence, and even pulls Shen Muyan to avoid the old path of "jade merchants competing against each other" and secretly plans to protect the jade pendant.
The secrets that can be traversed follow like a shadow, and the turmoil of the Republic of China far exceeds the documented records - when the rouge in the brothel is mixed with the smell of gunpowder smoke, and when Shen Muyan's confession hits the reality that "she does not belong to this era," Lin Wei understands: In order to keep the fireworks on West Street and protect the brilliance of the national treasure, she must first let "Ayu" live her own light in this troubled world.
This time, the story of the West Street girl is not only about love and romance, but also about the shock and responsibility when the jade is broken.