"When Guendelsberger took a pre-Christmas job at an Amazon fulfillment center outside Louisville, Kentucky, the vending machines were stocked with painkillers, and the staff turnover was dizzying. In the new year she traveled to North Carolina to work at a call center, a place where even bathroom breaks were timed to the second. Then she was hired at a San Francisco McDonald's, narrowly escaping revenge-seeking customers who pelted her with condiments....

Tells the parallel stories of nine-year-old Carlitos and his mother, Rosario. In the hopes of providing a better life for her son, Rosario works illegally in the U.S. In Mexico, her mother cares for Carlitos. Unexpected circumstances drive both Rosario and Carlitos to embark on their own journeys in a desperate attempt to reunite. Along the way, mother and son face challenges and obstacles but never lose hope that they will one day be together again....