Security guard David Dunn uses his supernatural abilities to track Kevin Wendell Crumb, a disturbed man who has twenty-four personalities.
 
This Glass is half-full.
 
FUN FACT:  Samuel L. Jackson said of working with James McAvoy on the movie, "As good as I like to think I am or what I do and how I do it, watching somebody transform characters in front of your eyes and have an argument with four different people is pretty amazing."