Lee Jun Ki reveals the past of Kang Moon Young and takes charge in trying to bring justice to her enemy Kim Yong Kun. 

On October 4th's episode of "Arang and the Magistrate'" on MBC, Eun Oh's father comes to see Eun Oh in order to explain the past of Eun Oh's mother, Lady Seo. 

According to his explanation, his mother's father was trying to stop Lord Choi, who was incredibly corrupted and used his status in order to do all kinds of wrongdoings. However, Lord Choi created a false conspiracy and blamed it all on Lord Seo and everyone except for Eun Oh's mother was killed. 

That day, Eun Oh also learns that her mother hid out in Lord Choi's house in order to avenge her father and Eun Oh also becomes determined to avenge her mother by capturing Lord Choi.

After that, citizens begin coming to Eun Oh to reveal many of Lord Choi's corruptions by sharing things with him. They say that they were all afraid that they would be punished if they told the Magistrate things. 

People expect that tensions will rise as Eun Oh goes after Lord Choi.