The Guest (2018)

It is the Older Brother (1x4)

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Gil Young tries to find the culprit of the murder case after talking to Hwa Pyung, but keeps failing. Hwa Pyung visits the junkyard with Yukgwang, and tells Min Sang that his younger brother, Min Gu, is possessed. After convincing Min Sang, Hwa Pyung calls Yoon to perform exorcism on Min Gu.