Thousands of years ago, the brutal Seymour tribe used meteorites to create a crystal coffin in an attempt to use its mysterious power to expand their power. Unexpectedly, a rebellion broke out within the sect, detonating the mysterious power of the crystal coffin, and the ancient country was razed to the ground overnight... During the Republic of China, Ding Yanchang, a descendant of the retired tomb raider, was forced to embark on an adventure with his creditor Huang Haishan and others to find the ruins of the Seymour underground palace in order to save his companions' lives. The group went deep into the tiankeng and encountered attacks from unknown creatures. Ding Yanchang and his companions mistakenly crossed the time and space node during their escape, and encountered the mysterious woman Wen Dona, who led them to the ancient city that disappeared a thousand years ago. Conspiracies and strange creatures came one after another. In the midst of many crises, Ding Yanchang and Wen Dona fell in love with each other, and went deep into the tiger's den with their companions to thwart the millennium conspiracy of the descendants of the Seymour tribe and save the people. In the end, the two had to separate, and Ding Yanchang left the different time and space and returned to the real world with his companions.