Zhao Yan, a student from the Department of Archeology, traveled through the late Eastern Han Dynasty and became a scout in Youzhou. With the mysterious system in his hands, he had insight into the shocking conspiracy of the Shi Chang Shi in collusion with Wu Huan and the Yellow Turban to awaken the giants in the deep sea. From the strange murals in the Mangshan Ancient Tomb to the prehistoric seal of King Yu's Jiuding, he dealt with Gongsun Zan's suspicion and Zhang Jiao's sorcery. When the ghost-faced algae parasitizes Jicheng and the mirage dragon stirs up the sea, only by deciphering the remaining chapters of "Yu Gong" can we prevent this abyss of disaster from flooding Kyushu. This is a troubled time where history and Cthulhu are intertwined. One person and one halberd can restart China's destiny.