In the frontier town of Stetson City, Arizona, in 1885, business is booming at the Trigger Whisky Saloon. Tornado Lou, the local chanteuse, regales the saloon-goers with a sultry ballad ("Když v báru houstne dým"), while the saloon owner Doug Badman tries in vain to woo her. Two evangelists, Ezra Goodman and his daughter Winnifred, enter the bar attempting to drum up interest in their temperance movement, but the saloon's hard-drinking cowboys scorn them. Into the fracas steps a stranger: Lemonade Joe, a lone cowboy singing the praises of Kolaloka, a non-alcoholic soft drink (in Czech, "limonáda", hence the name; the name is throughout the film pronounced phonetically "yoh-eh", as a tongue-in-cheek hommage to a practice common among the Czech fans of Wild West novels at the time). His superior gunfighting skill quickly convinces the saloon-goers of the benefits of teetotalism. Before long, Joe and the Goodmans have joined forces, Joe has begun courting Winnifred, and all the cowboys in Stetson City have transferred their loyalty to the cathedral-like God Bless Kolaloka Saloon ("Arizóna, to je pravých mužů zóna").