After narrowly escaping a life-threatening situation during a legal mediation, Mr. Shin begins to uncover a massive conspiracy hidden behind a group of salted seafood merchants. Curious about Mr. Shin's true identity, Pillip quietly begins to investigate him. Meanwhile, Mr. Shin takes on a new case. At the same time, a video of a man wearing a bomb vest begins to go viral.

Mr. Shin steps in as a negotiator representing the hostage-taker. Risking his life, Mr. Shin leads tense negotiations in a desperate bid to save both the hostage and the perpetrator. Meanwhile, Pillip and Officer Kim uncover the illegal ties between Yongdan City and the fertiliser factory, and urgently relay the information to Shin. However, the negotiation ultimately falls through, and a deafening explosion erupts, engulfing the site in flames.

Si-on is harassed by her old classmate Choi Yong-min while out on a delivery. Pillip steps in to protect her. Furious that his employees have been harmed, Mr. Shin takes matters into his own hands. Meanwhile, Mr. Shin and Philip uncover a deeper conspiracy, one that leads directly to City Councilman Choi Woong-sik, Choi Yong-min's father.