The master of martial arts lived in seclusion in a small courtyard in the mountains. During one of his trips, he rescued an orphan living on the street. He felt very pitiful about it, so he took him back and nurtured him carefully. One time, he sent him out to perform a mission. He accidentally learned the truth about the murder of his family many years ago, and the master behind the organization that killed his family had a deep connection with the person he trusted most...
Concept: Seeing is believing, hearing is believing