Back in the present time, Conan realizes what the riddle actually means. Conan writes down the symbols for port, castle, flood gate, post office, middle school, and city hall. It is revealed that even if "S → W" could mean South to West, when the symbols are turned 90 degrees, they mean 'ox hide' in english letters. Conan rips open the leather wallet which reveals a message for Yusaku Kudo from the original Phantom Thief Kid, a single question mark. In the past, Yukiko Kudo has dinner with Toichi Kuroba and hands him a letter from Yusaku. It contains a single exclamation mark, revealing that Yusaku received Toichi's message and implying that he knows Kid's true identity.