Inspector Joy

Yi Eon continues to go after Park Tae Seo who fled from the execution, but he fails in catching him. Yi Eon gets removed from his position and starts to blame himself. Then, Jo Yi shows up before him and cheers him up. They go out together and happen to spend a night at Yi Eon's place. The next day, Yi Eon is summoned to the palace by the royal order and appointed to a new position by his new supervisor.

Yi Eon's grandmother continues to pressure Yi Eon to marry a woman she chooses for him. Yi Eon resists until the day he leaves for Ganghwa Island in order to catch Park Tae Seo. In the market, Jo Yi runs into Seung Yul who now works as a lawyer. Seung Yul sincerely tells his feelings for her with a gift that Jo Yi wanted to have years ago. Meanwhile, Park Tae Seo finds out a secret about his birth and falls into a state of panic.

Yi Eon receives evidence from Tae Seo that Park Seung was the mastermind in poisoning the crown prince. Jo Yi witnesses Park Seung hiding a letter inside the sock that he had specially made. Tae Seo head to Hanyang to testify against his father's crimes, but Park Seung and Do Soo head to Ganghwa Island.

Yi Eon takes Park Seung to the edge of a cliff before taking him into the Department of Justice. Although given one last chance to repent for his sins, Park Seung does not show any signs of remorse. Later on, Yi Eon finally resigns from his post. He tells Yuk Chil and Gu Pal about his plans for the future which shocks them both.