The Ominous Guest

Youngjun, a university student who didn't believe in spiritual existence at all. He has a younger sister named Soyoung. But after she returns from university membership training, she gets a strange disease. Her condition is getting worse, and what happens around her is so weired that it is scientifically impossible to solve that the hospital cannot take proper measures.

One day, an old man of family comes to Youngjun, who was struggling every day to save his dying sister, and introduces a distant relative named "Doyeon." The old man tells him that Doyeon is like a kind of shaman and that he has seen him fix people with the same symptoms as Soyoung in the past. Youngjun visits Doyeon with the intention of holding a straw, but Doyeon refuses to let Youngjun visit.

Then one day, starting with the doorbell sound heard at Doyeon's house, something mysterious appears in front of the two of them. Then, gradually, terrible events begin to happen to the two one after another…. Ghosts chasing, Doyeon’s dark past being revealed. What will be the ending that the two will face?