The Kurikara Detective Agency is asked to come to Monkey Island to solve a terrifying mystery. On the plane journey a passenger is murdered. Kuroda and Aota, two police detectives, try to keep the Özora's from interfering, but Hibari manages to flirtatiously convince Kuroda to let them help. Another criminal tries to hijack the plane but is comically ignored as the Detectives and Özora's argue. Suzume discovers the victim is alive and had been playing a practical joke. After parachuting to Monkey Island Suzume spots a suspicious man in a mask. The mayor, whose daughter Yukiyo is identical to Rie, explains that his other daughters, Hanayo and Hoshiyo, both disappeared and he is afraid Yukiyo is next...