Ba Reum keeps hearing Yo Han's voice in his head telling him to kill people. Bong Yi runs into Kang Duk Soo, which makes her anxious. On a rainy day, Kang Duk Soo starts making a move again.

The DNA result found on the weapon that was used to kill Kang Duk Soo confuses Moo Chi. Bong Yi joins Hong Ju's team and starts investigating the Suseong serial murder case.