Too many ghosts

Paradine Hall appears to be haunted--there is a poltergeist that throws furniture around and pictures off the wall, a ghost that makes the candles go out and objects appear out of nowhere, a chair that moves by itself, and, even more unsettling, a harp that plays by itself in a locked room. Alexander Hero, psychic investigator, has to sort out all the seeming ghosts and find out what--or who--is really behind it all.