Neuro, Yako and the detectives from the police are called to a restaurant that is famous for its food bringing glory and success to anyone who eats it. They have been asked to solve a case revolving around the disturbing letters being sent to the Head Chef, Unno Kouji. As soon as they arrive, however, Neuro predicts that the real mystery is about to happen. They are greeted by the owner Shirota Masakage, who after briefly introducing them to the Head Chef, takes them to his office where he shows the detectives the two threatening letters the restaurant received. Mere moments later, Unno is discovered dead in the kitchen. There are no suspects due to the circumstances. However, when Yako tastes one of Shirota's dishes, regarding it as "not food", Neuro becomes interested in him. With the help of the 777 Tools of the Demon World and his reasoning, he discovers that Shirota was the murderer and eats his mystery. He is arrested for murder and for cooking with the use of drugs (the source of glory and success for his food). (thetvdb.com)