Xu Tan, 26 years old, is the youngest inheritor of deep-sea shell inlay techniques in China. There are only three successors of this craft in the country, and she is the youngest and poorest. The studio was about to be unable to pay the rent, and her ex-boyfriend thought she valued shells more than him. After her master passed away, she was left alone to contend with a room full of shells.
Lu Zhigui, 22 years old, has a doctorate in marine biology. His family runs the century-old "Zhi Ming Tang". The first time he saw Xu Tan's works through the window, he decided one thing - he wanted this person to open the door for him.
One year it's a straight ball, the other year it's a hard ball. He chased her and hid, he took one step forward and she took two steps back. But when Xu Tan discovers that the grudges of the previous generation are between them, and when Lu Zhigui discovers that her family's business territory is eating away at everything she cherishes, how can this unequal love from the beginning continue?
This is a story about the deep sea, the moonlight, and those who refuse to admit defeat.