After a tornado in Qujiangchi, a water monster eats people. The prince is about to succeed his throne and sacrifice his mother on the Qujiang Pond on the Mid-Autumn Festival. He ordered Dali Temple to find out the truth of the Qingshui strange murder before the Mid-Autumn Festival. This task fell on Xue Yang, who was sentenced to guard Huajie. Through investigation, Xue Yang discovered that there was an underground ice cellar on the shore of Qujiang Pool. At the bottom of the ice cellar were scattered skeletons and human bones and hidden important secrets..