It is a film about the comeback of one unique runner, a 3-foot-9 physician assistant who has been mistaken for a runaway child while training. It's also about a city rallying against terror. Thousands of runners returned to compete, while a million spectators came back to cheer despite their fear. Many more around the world admired a city that wouldn't be intimidated by an attack that left hundreds wounded and three dead. "Undaunted" is also a film about every runner's fantasy: For the first half of the 2014 race, to the astonishment and sustained applause of thousands along the course, Juli led the pack.