Rong Jia'an, a young college student, was forced to return to his ancestral Shui Niang Temple on Majisha Island at the mouth of the Pearl River to temporarily pray after his grandmother Ping Gu disappeared mysteriously. The seemingly ordinary life of guarding the temple was broken by a late-night emergency call for help - three strange black coffins were found in the downstream fishing village traveling upstream, invulnerable to knife and axe, and leaking blood. In the coffin, there are not rotting corpses, but lifelike women and children from the Republic of China soaked in palm oil, leading to a mysterious case that has been sealed for nearly a hundred years.
Rong Jia'an managed to cope with it with the help of the shallow magic passed down from his family, but found that he had been involved in the invisible whirlpool. Following the cryptic clues left by his grandmother, he embarked on a journey to the isolated island "Dragon Cave Island" in the South China Sea. On the way, he met Zhou Yan, the owner of a diving club with a mysterious identity and strong skills, as well as travelers on the same boat with different purposes. There are many legends about Dragon Cave Island. It is not only a scenic spot to watch the magical "fluorescent sea", but also a forbidden sea area where divers have mysteriously disappeared one after another.
Intention: God is not worshiped because of his greatness, but because he is worshiped, he appears great; and Ji Tong is the one who can still decide "whether to continue to worship".