The Sleepwalker is a title that typically refers to a psychological thriller, mystery, or horror story, intended for an adult audience, where the central conflict involves an individual who walks or acts in their sleep. The plot would revolve around a sleepwalking character who is either witnessing a crime, committing a mysterious act, or experiencing dangerous situations without conscious memory. The story often uses the unreliable nature of the sleepwalker's memory to build suspense and explore themes of subconscious guilt, hidden desires, and the division between the conscious and unconscious mind.