104호와 살인사건의 연결고리를 찾아낸 호철!
한편, 미쓰리는 불안한 말을 남기고 떠난 104호를 찾아 나서는데..
Bong Man Rae admits to killing Yang Su Jin and takes his wife suffering from dementia to the water's edge. After sharing their last words, he drives into the water. Meanwhile, Ho Chul receives a call confirming a DNA match from the sample he requested and the DNA found under Yang Su Jin's nails.