Summer in the tiny Texas town of Antler is traditionally a time for enjoying Wylie Womack's Bahama Mama snow cones and racking up the pins at Kelly's Bowl-a-Rama, but this year it's not going well for Toby Wilson. But when Zachary Beaver, "The World's Fattest Boy," comes to Antler as part of a traveling sideshow, Toby begins to realize that there might just be people who have it worse than him.