 Writer Joseph O Donnell and actor Tim McCoy had a fondness for scripts in McCoy s films at Puritan and Victory that called for McCoy to pose as a Mexican, Chinaman or something in his role as an undercover lawman, although most viewers can t find much difference between these characters and McCoy as McCoy. This time out, federal agent William "Lightning Bill" Carson (Tim McCoy) and his pal Magpie (Ben Corbett) come to Lasson County posing as gypsies in order to end the raids of a bandit gang. They arrive in their fortune-telling guise/wagon at the ranch of Jim Bolton (John Elliott) and his daughter Jessie (Harlene Wood, now using Jill Martin as her screen-billing name), and Carson suspects ranch foreman Crane (Forrest Taylor) as being involved in the gang s activities. The actual head of the gang is respected citizen Bert Lee, who tells his henchmen Johnson (Kenne Duncan) and Mort Hodges (Ralph Peters) to keep an eye on the gypsies as he suspects they are federal agents. So much for the effectiveness of posing as gypsies. Even with his "cover" blown, Carson manages to get most of the outlaws to stand still while he shows them card tricks---pick a card, any card---, so he can get their fingerprints and have them checked out back in Washington. Somewhere along the way, Lee manages to frame Carson and Magpie on a murder charge, but Carson has an ace (king, jack and seven of clubs also) in the hole with the card fingerprints.