Fantastic locales. But then what's with this Mitty chap? Why is he like that? What's his problem in life? On one hand he is so good at what he does and on the other hand so out of touch with reality. He keeps dreaming and zoning off in the middle of conversations and living a fantasy life. For a few moments - but enough to get committed.
Anyway he gets a prod to chase the chap who had apparently sent him an important picture for Life magazine and thanks to that prod he lives an exciting life in a few days which he never had. Of course it all ends happily for him hopefully.
It's a bit disconnected. Like Mitty's mind. But thanks to the prod we get to see some fine locales.