Walter Mitty is just your average, ordinary guy. He carries a briefcase to work, struggles with online dating and harbors a secret crush on a co-worker. But in his daydreams, he saves dogs from burning buildings, climbs mountains in the arctic and is fearless when it comes to fighting for what he believes in. After years of working at the same job and sticking to the same routines day in and day out, he's finally arrived at a crossroads in life. And life for Walter Mitty is about to get a whole lot more interesting.