Ruan Guiyu, who adheres to the intangible cultural heritage skills of "Haenyeo", and Xie Yushen, a top luxury house designer who believes in "man can conquer nature", have emotional entanglements and collisions of concepts in a coastal development project. She reveres nature, and he transforms nature; she leads him to dive into the seabed to feel the tranquility and fragility, and he leads her to overlook the city and see the prosperity and order. When a project threatens the marine ecology, the two go from being opposed to working side by side, looking for a third way in the dual mission of ecological protection and cultural inheritance. In the end, Xie Yushen subverted the original design and created a "tidal museum" that integrates ecology, culture and art, allowing love and ideals to coexist and prosper at the intersection of sea and land.