The Great Zhao Dynasty is struck by a severe drought, leaving 100,000 people without water. Princess Royal Xiao Zhaoning accidentally travels to the modern world through a phoenix-patterned jade pendant, where she discovers that clean water is seemingly inexhaustible! Zhou Ye, a young man working at a water distribution station, comes to her aid, and together they search for a way to save the people. However, the jade pendant can only transport a limited amount of supplies. When she returns to Great Zhao, she discovers that the people still have no water to drink, while the imperial estate is using clean water to raise fish! Behind the drought lies a mysterious water-management case that has remained unresolved for three years. Facing countless obstacles, can Xiao Zhaoning uncover the truth and ensure that the people finally have access to water?