164화: 기호를 해독하면 유골과 위조된 접시가 발견된 숨겨진 다락방이 드러난다.

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Conan matches the symbols to the Hiragana table and reveals that the symbols in the objects direct to other objects in the room. Conan notices that the objects conjoin in the center of room and realizes it refers to the chandelier. Conan matches the markings on the chandeliers which causes a stairway to the attic to appear. The Junior Detective League find a skeleton of an elderly man in the attic. Conan reveals that man was the one who created the code and was sending the mail to Agasa's aunt. Conan finds a 20 dollar plate used for creating counterfeit money and explains that the man was hiding from the person who forced him to create plates. The culprit reveals himself and says that he had been searching the mansion for the plate for many years and attempts to steal it from them. Conan however apprehends the criminal and he is arrested afterwards. (Source: Wikipedia)