Single mother Rosario leaves her young son Carlitos in the care of his grandmother and illegally crosses the border into the U.S. Though she hopes to eventually make a better life for herself and her son, she toils in a dead-end job as a cleaning lady in Los Angeles. When Carlitos' grandmother passes away some years later, the boy begins a difficult and dangerous journey to join her. 2007. Rated PG-13. Spanish with English subtitles.