The Lady Vanishes (2013)

On a train journey across Europe, a young woman befriends an elderly English lady, who mysteriously disappears. When fellow passengers deny seeing the older woman, the protagonist investigates, uncovering a conspiracy. With the help of a young musicologist, they unravel a web of espionage and deception. This film is a gripping and suspenseful mystery, perfect for those who enjoy classic whodunits with a twist.