At the prison to interrogate an inmate, Yeo Jin runs into Shi Mok and Dong Jae. Choi Bit has Yeo Jin deliver a mysterious file to an assemblyman.

Shi Mok is ordered to find out what Yeo Jin knows about Bit's file. Ahead of a vote on the fate of her seat, Yun Jae sets up an important meeting.

When Shi Mok hears who's gone missing, he starts gathering clues by going through phone records. Yeo jin begins her own investigation.