Pat O'Brien makes the casual acquaintance of fellow American Ruth Warrick while on vacation in Mexico City. What Warrick doesn't know is that O'Brien is a treasury agent, out to get expatriate counterfeiters Alan Hale and Edgar Buchanan. What O'Brien doesn't know is that Warrick is also out to get Hale, whom she holds responsible for her father's death.
Eddie Le Baron
Himself - Continental Orchestra Leader (as Eddie LeBaron)