A physician whose wife was killed when two trains collided has remained . a tormented soul,In his mind,he can still hear his wife whisper "Stop the train!stop it!" .At night,he goes to the railroad track and becomes a saboteur;but when he comes back to his house,he cannot remember what he has done.A female colleague who takes care of his son discovers his secret and suggests he go to Vienna and consult a psychiatrist.When he returns ,he is cured...or he seems to be cured..which makes a big difference.