Hong Do and Yoon Bok, to solve the secret behind the thick paper, go to a paper factory. There, the two hear about the paper's quality from an elderly man. At that moment, Yoon Bok remembers her father Seo Jing turning his compressing machine and explaining it long ago. She puts the paper into the water and the paper dissolves, and a hidden face appears, startling Yoon Bok.
Episode Discussion
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