"The Spiral Staircase" is a 1946 film directed by Robert Siodmak, based on the novel by Ethel Lina White. The story follows a young woman named Helen who is a mute and lives in a secluded house. She becomes the target of a serial killer who is preying on women in the area. Set in the early 20th century, the film combines elements of suspense and horror. As the tension builds, Helen must navigate her fears and the dangers surrounding her, all while trying to find a way to escape the threat that looms over her life.