Chen Haisheng has possessed a pair of golden pupils capable of seeing strange lights at the bottom of the sea since childhood. To pay for his parents' medical treatment, he ventured out to sea to treasure hunt, but was betrayed by his cousin, nearly losing his life in the deep ocean. After breaking ties with him, Li Jianing, whom he saved in childhood, extends a helping hand to him. The two return to the shipwreck and unexpectedly discover mysterious pearls and clues to the relics left by his grandfather. As the three sea-guarding pearls, ancient archives, and the mystery of the sea eye are gradually unveiled, Chen Haisheng must not only face forces coveting the treasure, but also make a choice between the temptation of wealth and guarding the ocean, embarking on a deep-sea exploration journey full of crises and unknowns.