Mrs. Li comes to ask for Cai Wei's help in saving Da Shan at a mine outside the city. In order to find out the real cause of her father’s death, Cai Wei decides to go and find Da Shan. When the group arrives at the mine, people there tell them that Da Shan has been trapped inside the collapsed mine for four to five days, but Cai Wei does not give up. (Source: Viu)