I have this movie on a collection of inexpensive B-movies. It's not restored, in fact, the audio was difficult to discern for the first few minutes.

At first, it seemed like a typical haunted house film, and feels very much like the forerunner of Clue, Murder by Death, House on Haunted Hill, etc.

About a half hour into the film, the storyline takes a really interesting twist--and it goes from being a cliché melodrama to something entirely different, and far more entertaining than I had initially thought.

Check it out, it's a great deal of fun, even if the long clips and wider shots (and near lack of music score) make it feel a bit creaky by today's standards.