In Nanjing, there is a place where you can pay hundreds of yuan to arbitrarily tie up or even "dispose of" one or several female models in a completely private space. At first, the reporter did not believe that such a place could exist. However, with the help of an informant and after three months of undercover investigation, this legendary "place" gradually came to light. Through interviews and information feedback, a "underground dungeon" involving sexual abuse was revealed to us...