Kang To corners a man in a bridal mask, while he whispers to him that he is his brother. Kang to has a lot of questions, although his brother hasn't planned to tell him about his past life and still pretends to be mentally ill. Boon Yi tells the story of the importance of that specific knife.

Siding with the Japanese as a Joseon people, young police detective Kang To is always at danger, even during festivals. The Japanese give him every tool to catch Bridal mask.

The brother of Kang To has been accused of being Bridal mask by the superintendent, while his screaming mother is protecting him to the death.