Forced to give up his land and home, Texas rancher Red Bovie is not about to retire quietly in a trailer park. Instead he jumps in his Cadillac and hits the road with his estranged grandson for one last wild adventure filled with guns, women and booze. It's just another night in Old Mexico.

Four orphaned and homeless siblings happen upon an abandoned boxcar, which, with a little creativity and hard work, they gradually furnish with all the comforts of home. Fearful that they will be sent to live with the reputedly cruel grandfather they have never met, the children keep their new home a secret--until a serious illness forces them to reveal themselves in order to save young Violet.