To a certain extent. I don't believe every person who claims to be a medium is telling the truth. I also don't believe the ones who can actually talk to those who have passed on can talk to anybody who has passed on. It would be hard to since some spirits are more self reserved or they wouldn't directly go and reach out to a medium.
Since I don’t know what the story is about, I can only infer that this is from Witcher 3 where you hunt for the ghost of the well. Children and the man were consumed by the ghost.
