In the forty-eighth year of the Republic, on an island where strangers lived side by side, a case involving a corpse found floating in the water became linked to the disappearance of a smuggling ship laden with gold, turning into a mystery famous both on and beyond the island. Life on Ma Island was harsh, and its hierarchy rigid, but people who gained privileges through all sorts of lies got along with everyone just fine each day. Recently, the United Association announced its decision, and the selection of a permanent autonomous region was imminent. In hopes of becoming citizens of that region, the islanders became increasingly law-abiding and cautious. Unfortunately, fate had other plans. The sudden appearance of a corpse shattered the peace, and the secrets collectively concealed by the residents of Shouchun Pool brought each person's own hidden secrets to light. The disappearance and reappearance of a dead woman led to several old cases and suspicions surrounding the United Association's Twin Cities Plan. Just as everyone feared their own scandals would soon be exposed, a savior appeared. Yet who could have guessed that the real trouble was only just beginning...