Late one night, Bill Greer and his son Jackson patrol their ranch when Jackson accidentally kills an immigrant Mexican boy. When Bill tries to take the blame for his son, Jackson flees south on horseback, becoming a gringo “illegal alien” in Mexico. Chased by Texas Rangers and Mexican federales, Jackson journeys across Mexico to seek forgiveness from the dead boy’s father only to fall in love with the land he was taught to hate.

Married small-time crooks Lou-Jean and Clovis Poplin lose their baby to the state of Texas and resolve to do whatever it takes to get him back. Lou-Jean gets Clovis out of jail, and the two steal their son from his foster home, in addition to taking a highway patrolman hostage. As a massive dragnet starts to pursue them across Texas, the couple become unlikely folk heroes and even start to bond with the captive policeman.