Johnson and Emerson wish to hire her to uncover white traders illegally selling guns to an Indian tribe near Buffalo Flats, one of the frontier areas; because the agents they previously sent to investigate have turned up dead, they feel they need a new approach and have conceived a plan to use Jane, both as a woman and skilled gunfighter.

The plan is for Jane to meet in Port Deerfield with Jim Hunter, another government agent, pose with him as a married couple, and join a settler's trek to the area where the gun running is taking place.

Evading an attempt on her life, she hitches a ride with Peter "Painless" Potter (Bob Hope), a traveling dentist fleeing town following one of his habitual blunders, and marries him to maintain her cover and to coerce him into joining the wagon train.

The gun smugglers also join, to ensure delivery of a stash of dynamite and to track the federal agent sent to thwart them, believing Potter is their target.

When this clash leads to a duel, Jane initially plans to allow Potter to be killed, to throw off the smugglers, but instead ends up aiding him again because she wants to use him as a decoy and because she has begun to fall in love with him.

Jane manages to manipulate Potter into going to the undertaker's to scope out who comes to pick up the dynamite; she prepares to follow in his wake, but both are captured by the smugglers and taken to the Indians' camp, where Martin has arrived with the rest of his weapons shipment.

[6] Variety wrote that the film is "a smart-aleck travesty on the west, told with considerable humor and bright gags" and that "Bob Hope has been turned loose on a good script.