A woman travelling to Los Angeles by train notices the suspicious behaviour of two of her fellow passengers, and alerts a policeman when she arrives. The cop investigates with the help of a fellow detective, discovering the men are involved in a kidnapping plot and the ransom exchange is going to take place somewhere in the station. Crime drama, starring William Holden and Nancy Olson.

Police catch a break when suspected kidnappers are spotted on a train heading towards Union Station. Police, train station security and a witness try to piece together the crime and get back the blind daughter of a rich business man.