What is the name of this movie?

The movie is Haunted, an excellent but little-known ghost story released in 1995. It is a favorite of mine. Aidan Quinn plays a parapsychology professor who channels his feelings of guilt over the death of his twin sister into a career of debunking hauntings. It is set in England in the 1920’s and was based on a book by British horror novelist James Herbert. An elderly woman implores Quinn to come to her aid because she is being tormented by ghosts. He travels to her house and begins an investigation. But the other residents of the house, an attractive woman and two men, insist that the elderly woman is losing her mind. Quinn develops a romantic relationship with the young woman, which makes one of the two men extremely jealous. Eventually, Quinn’s dead sister appears to him and reveals that the three young people of the house are ghosts — siblings who died in a fire years ago. When alive, the siblings had a wicked, incestuous relationship. The ghosts kill the old woman and make Quinn the new target of their torment. They lock him in the room where they died and set the house ablaze. With the help of his sister’s spirit, Quinn escapes. But in the closing shot of the film, the ghost girl with whom he had the sexual relationship is seen following Quinn back to his apartment.

You may have a difficult time tracking down a copy of the movie for a reasonable price. It was released in the early days of DVD and quickly went out of print. Used copies have been selling for ridiculous prices for a long time. I don’t think it has been reissued. I couldn’t find a copy on youtube — maybe you’ll have better luck. Or perhaps it is available through Netflix. I used to see VHS copies from time to time at flea markets, but not in several years.