While traveling by train, a young socialite is befriended by a charming yet enigmatic older woman. However, when the woman disappears, the other passengers deny she ever existed.While traveling by train, a young socialite is befriended by a charming yet enigmatic older woman. However, when the woman disappears, the other passengers deny she ever existed.While traveling by train, a young socialite is befriended by a charming yet enigmatic older woman. However, when the woman disappears, the other passengers deny she ever existed.