Li Hao, a descendant of a tomb-robbing family, has been exploring wealth and secrets in his family's heritage. During an accidental family gathering, he got a tattered map that revealed the mysterious ruins of an underwater palace. With the family's mission, Li Hao, archaeologist Wang Li, and technical expert Zhang Tao formed an expedition team to go deep into the deep sea to search for this lost civilization. However, when they stepped into the ruins of the palace, they discovered a secret far beyond their imagination: the ancient civilization abused its powerful force, leading to a catastrophic demise. In the process of uncovering the historical truth, the trust between team members began to collapse, external threats ensued, and some people even began to secretly plan to use this dangerous power. Li Hao faces a difficult choice: should he bring this power back to the world, or let it sleep forever in the deep sea? When history and the future intertwine, can he keep his family's mission and prevent a disaster that may happen again?