 Someone is selling guns to the Indians and in order to find the culprit Calamity Jane and a secret agent go undercover posing as man and wife. When the agent is killed Jane recruits a new husband -- none other than innocent dupe "Painless" Peter Potter, a totally inept dentist and confirmed coward who s main goal is to leave the barbaric west far behind. When their wagon train is attacked by the Indians it s Jane s sharpshooting that saves the day, but she gives the credit to Potter making him an instant hero to the townspeople and instant target to both the Indians and the gunrunners.