When the story begins, Hoppy and his partners come upon a dying man. Soon, he dies and Inez sees this and automatically assumes the trio killed him. Like the angry stereotypical women I've seen in a few of the Hopalong Cassidy films, her anger makes no sense...and she never gives them a chance to explain. She then, at gunpoint, forces them to go with her into Mexico. There, she turns them over to Mexican authorities...only to be told that she just kidnapped three Texas Rangers! And, like the angry stereotypical women trope, she STILL thinks the three are murderers!
One reason Inez is so angry is because her boyfriend went to work at a mine in the States...and he simply disappeared. The same has happened to other Mexicans....and Hoppy, California and Johnny all agree to go to the Silver Bullet Mine to look for clues. But, when they approach the mine, they are attacked and soon are before a kangaroo court bent on hanging them. Why? What's going on here?! And is there any chance for Inez to grow up and let go of her weird vendetta?!
This is a good but flawed installment. Flawed because Inez's character simply makes no sense at times. The rest of the story, however, is interesting and involves slavery...an unusual topic for a B-western. Worth seeing.