Qin Chuan, who died suddenly after staying up late in his previous life, became the dandy waste of the same name in the Dayin Dynasty. His handsome father recently lost his life, his family property was taken away, and even his fiancée found another career. Faced with the empty shell of the Duke's mansion and his young and helpless sister, Qin Chuan discovered that in this era, tea ceremony was at its peak but its craftsmanship was primitive. When modern agricultural knowledge awakens - "Have you ever heard of the technique of frying green tea?" Starting from a dilapidated tea house on the verge of closure, he used technology and hard work to subvert the ancient tea ceremony. A noble daughter of an aristocratic family spends a lot of money just for new tea, and a princess of an enemy country goes undercover to learn art from a teacher. Even the fiancée who abandoned him knelt outside the door late at night... But when he was dubbed the "Tea Saint" and was about to reach the peak of his life, a border secret report revealed the bloody truth: behind his father's death in battle, there was actually a shocking conspiracy of the chief minister of the dynasty who was addicted to tea. A cup of tea stirs up the world.