Fang Dalin inherited his father's business and became a tidal flat bamboo curtain fence maintenance worker. After reuniting with his first love Lin Weiyang, they jointly contracted the tidal flat. They used the ancestral "yin and yang buckle" tying method to operate the fence, but they suffered a huge loss during the super typhoon season. Fang Dalin blamed himself for all the technical mistakes, leaving all his belongings and walking away alone. Lin Weiyang examined every broken bamboo strip in the ruins one by one, and spent three years proving that his "mistakes" were actually sacrifices to preserve the cultured creatures. When Fang Dalin returned with new technology, a brand new double-layer bamboo curtain had been erected on the beach, and each knot was tied with a "swivel buckle" that he did not dare to complete back then.
