Barbers Willy Nilly and Hercules Glub have opened a barbershop on an Indian reservation, where they have no customers. When suddenly a white man asks for a shave, several Indians of the Oopadoop nation also enter, hearing the usual barbershop banter about foreign debts, they force them to be ambassadors of their nation at the Peace Conference in Geneva. Ammunition industry executive Winkelreid is scheming to prevent their mission becoming an success, but vamp Dolores aboard the ship fails, falling in love with Nilly, and so does Fifi, the world's toughest person in Paris, falling for Glub. Although Winkelreid is able to steal their secret papers, Nilly and Glub don't give up after being reminded by constant observation of their Indians and enter the Peace Conference, which turns out to be a battlefield.