Olbbaemi plot
Kyeong-soo is a blind acupuncturist. During the day he can't see anything, but at night he sees strangely like a normal human being. One evening, Kyeong-soo happens to witness the death of the Crown Prince. This death drives King Injo to madness. Subsequently, Kyeong-soo tries to reveal the truth behind the death of the Crown Prince.