The protagonist Wu Xie (Hou Minghao) is a descendant of the Wu family of the Old Nine Gates. After escaping from the heavily-entrapped "Seven-Star Lu Palace" of the Warring States Period, he returned home and found that his third uncle Wu Sanxing (Yao Lu) was missing, and it also involved a mystery of an archaeological team more than ten years ago. Wu Xie received a letter from the mysterious Aning. In order to find his third uncle, he went to the Xisha Ming Dynasty shipwreck underwater tomb to look for clues. He met Wang Pangzi (Zhang Boyu) who had separated from the Seven-Star Lu Palace, and also found the mysterious ancient snake-browed bronze fish and the amnesiac Zhang Qiling (Cheng Yi). It seems that there is another reason for the little brother to come to the Xisha underwater tomb. In the process of diving into the mysterious Ming Dynasty ship tomb, he encountered attacks from monsters such as sea monkeys and forbidden women, and finally broke through the layers of traps of Qimen Dunjia and returned to land. However, the clues of the snake-browed bronze fish and the hexagonal bronze bell led them to the Qinling Mountains to explore the secrets of the huge bronze tree.