A beautiful yet heart-wrenching tale follows the romance between the son of the number one tea merchant in Jiangnan and a tea harvest girl.

Cheng Jing Mo is the only son and successor of an established tea business. He is a carefree child who has a passion for the arts. Ruan Qiu Shui is incredibly skilled with numbers. She is a tenacious girl who takes on the burdens of her father's debt and cares for their family. As the two meet, Shui and Mo's lives become so intertwined, just like water that has been mixed with ink.