Lee Joon Gi is shocked after finding his mother's hairpin at the scene where Shin Min Ah was stabbed.
In the 5th episode of 'Arang and the Magistrate' that was aired on the 29th of August, Choi Joo Wal (played by Yeon Woo Jin) stabs Arang (played by Shin Min Ah) in the chest and offers her body to Eun Oh's mother (played by Kang Moon Young).
However, the stabbed Arang is able to run away and out of the woods. Eun Oh (played by Lee Joon Gi) discovers Arang and lays her down in bed.
After finding out what happened to Arang, the next morning Eun Oh goes to the place in the woods where Arang was taken to.
Eun Oh looks carefully around the seen and discovers his mother's hairpin there. Shocked, Eun Oh asks, "What is my mother's hairpin doing here?"
This episode was fully of mystery. The viewers' responses included, "This episode was fun," "Eun Oh's mother is scary," "The more you watch, the more mysteries that appear," "This drama is so scary."