Review of Hide and Never Seek

The plot twist at the end is that the Producer was possessed. If you payed attention you probably noticed that before Ya-gwang went into the building to broadcast the stream, he talked to his producer and said to him "Did you do your hair for this?" and so on, and the producer didn't even turn around or said anything to him. And after that when Ya-gwang was at the roof of the building and was asking for the producer to help him, he also didn't say anything. In the end of the movie we see that they actually did the ritual beforehand and that is when the producer got possessed,