Oh Soo's determined to solve the case of the serial murder. Possibility of the suspects has gradually narrowed too. As Oh Soo is getting closer to the truth, evidence shows that this is all related to the case 12 years ago. So he goes to look for his high school friend, Young Chul. The suspect of the Dae Shik murder wishes Seung Ha to look after her daughter So Ra, but Seung Ha brings her to Hae In's home. (Source: Viu)