According to the United States Census Bureau, the city has a total area of 3.8 square miles (9.8 km2), all land.Around the southern edge of town is an area of strong salinity, which imposes limitations on farmers and gardeners.The climate in this area is characterized by hot, humid summers and generally mild to cool winters.The movie visits the Mexican-American community that had worked the onion fields of rural South Texas in three different eras, observing how the seeds of change planted 20 years ago seem ready to bear fruit today.Politicians and officials interviewed in the film include Larry Spence, former District Attorney Juan Angel Guerra, Paul Whitworth, Wetegrove families, Dr. Allan Spence, and school-board and city-council members.