Who is the Real Park Il Do?

After meeting with Father Yang, Yoon finds out why Yun Hwa Pyung is obsessed with finding Park Il Do. Hwa Pyung is released from police custody and later is warned to stay away from Congresswoman Park by a thug. The next day, when Hwa Pyung visits his grandfather, an old lady comes to the house asking for help. Supposedly, her granddaughter is acting strangely just like he did when he got possessed 20 years ago.