빛나는 선의 도움으로 화백 생일날의 흔적을 쫓는다.
한편, 화백이 죽기 전 해준을 양자로 입적했다는 사실이 밝혀지는데…
The police start their investigation and conclude that there are signs Mr. Yoo's death could be a murder. After reviewing the security cameras, they also learn that no one else entered the house the night of his death, leaving only the inhabitants as suspects. Later, the detectives discover Mr. Yoo's safe and an important clue.
