They become involved in a serial murder case , where the victims are stabbed through the wallet and heart with a knife .
Conan , Rachel , and Richard are given a tour of Osaka by Harley and Kazuha Toyama .
Harley become involved in a serial murder case , where the victims are stabbed through the wallet and heart with a knife .
Conan , Rachel , and Richard are given a tour of Osaka by Harley and Kazuha Toyama .