Based on

Movies like Covered Tracks (1938)

Séraphine and her mother arrive in Paris to visit the 1867 World Exhibition. In an overcrowded city they must be accommodated in separate hotels. During the night the mother, who wasn't feeling very well, gets suddenly worse. When next morning Séraphine goes to meet her every trace of her presence has disappeared and everybody denies having ever met her. The bewildered young woman must find someone who believes her. Previous version of So Long at the Fair (1950).