The Unknown Ranger

A man named Chandler, claiming to be a novelist in search of local color, arrives at a town near the Mexican border, where he makes advances toward Jo, a girl living a solitary life on a desert ranch. Manning, a cowboy, suspects Chandler's motives, and his suspicions are strengthened when Chandler is caught cheating at cards. Following a gang of Mexicans to their mountain retreat, Manning learns that Chandler and the Mexicans are smuggling opium across the border.