Flint is decoyed by a beautiful girl with a sprained ankle and captured by Comancheros. They want a wagon load of Army rifles the Major is carrying so they deliver a ransom note from Flint asking for the rifles in return for his life. When the daughter of the leader Conchita Vasquez discovers Carlos Soldareo killed her father, she helps Flint escape also believing her and Flint are in love. Conchita is accepted warily by Adams. She has trouble fitting into the new environment and when Flint tells her he is not in love with her, she decides to get revenge by changing sides again. After talking to Carlos, she tells the Major to use a pass that will make it easy for the Comancheros to attack the train. Adams believes her over Flint's objections. At the pass Adams and Flint are suspicious and decide to test Conchita's feelings as Flint checks the pass.
—Anonymous