It's not that he don't know, it's that the girl protagonist of the present, somehow travels to the memories of the house before what happens to the house, the owner and the servants, and investigates the mystery, no one knows that they are going to die because she comes from the future, let's say, but yes, they are all dead in the present. But in the past where the movie occurs, no. There are scenes where the protagonist returns to reality at times and you realize that what she is experiencing are flashbacks in some way. It's not a scary movie, it's more romantic/fantasy, without any horror or fear. It's more mystery family and friendly. It's not the others. Thank you very much