Synopsis: Roy Rogers and a couple of his Rough Rider buddies -- Rusty and Tommy -- join the Border Patrol. First, they successfully find missing young woman Dorothy Blair. They then try to track down bandit Arizona Jack. During the chase, Tommy is killed by Jack, and Roy and Rusty decide to cross the border into Mexico to find the outlaw. But Jack has plenty of reinforcements waiting, and Roy and Rusty may be in over their heads.