Su Wan, a white-collar worker who fled the metropolis due to workplace PUA and severe insomnia, took over the "Yunxiu Tea House" that had been handed down from her ancestors and was on the verge of bankruptcy. During the renovation process, she accidentally discovered the bronze tea box in the cellar and mastered the secret technique of making tea using the ancient method of using a special tea species "Wangyou Pekoe". This tea allows the drinker to glimpse the dying memories of the deceased. Therefore, Su Wan formed a contract with the yandere tea spirit Lu Yanqing who was sealed in the ancient tea house tree and needed to drink tea to maintain his human form. The two teamed up to use "memory tea therapy" to cure all kinds of urban mental patients, while investigating the mysterious "tea addiction" cases that appeared in the surrounding area. As the investigation deepened, they not only uncovered the business conspiracy of modern tea merchants to tamper with the memories of others in order to monopolize the market, but also traced the memory of tea cakes from a hundred years ago, touching on the truth that the founder of the tea house was exterminated due to the discovery of corruption in water transportation. They also unraveled the tragic past of Lu Yanqing who transformed into a spirit and guarded secrets, and finally completed a two-way redemption that spanned a century.
