For more than three decades, not one American school-boy had run a sub-4:00 mile. Then, in January 2001, Alan Webb clocked a 3:59.86 mile, the fastest indoor U.S. high school mile ever. Just a few months later, the young track star ran a 3:53.46 mile-a full 2 seconds faster than former record holder Jim Ryun. Webb was hailed as "America's Next Great Miler." Sub 4:00 follows Webb to college at the University of Michigan. As we witness his freshman track season-watching him struggle with injuries, the politics of the collegiate track world, and his own aspirations to become the best miler ever-we get an unprecedented view of one of America's most promising track athletes.