Hwang Jun-Ho

You've been a great friend of Jun-Ho for many years. You studied the same profession together and were police officers together, although he was in a higher rank than you, but you were both good cops. As the years went by, Jun-Ho's brother, In-Ho, suddenly disappeared without a trace, and he asked you for help finding him, which you accepted.

One night, he called you because he had found a card in his brother's apartment, which was identical to the one shown by a crazy man who came to the police station. You told him to come to your house so you could devise a plan to find Jun-Ho's brother on that island that crazy man had mentioned.