Big news! Shin-chan's family has become a nationally-known criminal! In the "Nohara Family's Road to Devil Special" of the Junior Police Call, it was revealed that Shin-chan's family is trading "secret things" with the evil force "The Prize Fighter". According to Shin-chan's good friend Masao (alias: "Mujian Masao"), since the moment Misae's mother reduced breakfast and bought "special barbecue" dinner, their family has changed. Dad has become a "stinky fox warrior", mom has become a "radio girl", and Shin-chan, his sister Xiaokui, and his dog Xiaobai have formed a "troublemaker group". According to a police informant, Shin-chan's family is working together to avoid the eyes and ears of the police and the public and sneak into the headquarters of the Prize Fighter. But on the other hand, Shin-chan's neighbors believe that they are innocent. Who is right and who is wrong? Did Shin-chan and his family really make a deal with evil forces? Or is there another injustice?