In trademark style, master of suspense Alfred Hitchcock directs this taut and chilling tale about Charlie (Teresa Wright), a small-town girl consumed with finding out whether her unhinged Uncle (Joseph Cotten) is a serial killer or not. The arrival of detectives and a suspicious neighbor (Hume Cronyn) only increase Charlie's paranoia. But tension builds as she draws closer to the truth, culminating in a nail-biting scene aboard a speeding train.