Barry Sullivan is a Pinkerton agent. He's sent to gather information on the Hole In The Wall Gang. Barbara Stanwyck, who fronts for them and is Scott Brady's lover -- he plays the Sundance Kid -- falls in love with Sullivan. There's also a subplot about Mary Murphy, whose cattle keep getting rustled.
It's hard for me to judge this movie, because I saw it with the visuals wrecked. Released by Republic at a 2.35:1 aspect ratio, I saw it in TV-standard pan-and-scan, wrecking cinematographer Jack Marta's compositions and reducing every shot to an undistinguished series of close-ups and medium close-ups. The story is one of those A Westerns from the 1950s, meant to star a woman or two in trousers, but with the action carried by the men. I'm pretty sure that if you got to see it at its proper aspect ratio, you'd like it a lot. The way I saw it, though, reduces it to mush.