A kidnapped mobster (Vittorio De Sica) persuades his captors to help him rob platinum ingots from a train.

An eccentric professor invents wacky machinery, but can’t seem to make ends meet. When he invents a revolutionary car, a foreign government becomes interested in it, and resorts to skulduggery to get their hands on it.

Stodge City is in the grip of the Rumpo Kid and his gang. Mistaken identity again takes a hand as a “sanitary engineer” (plumber) by the name of Marshal P. Knutt is mistaken for a law marshal! Being the conscientious sort, Marshal tries to help the town get rid of Rumpo, and a showdown is inevitable. Marshal has two aids – revenge-seeking Annie Oakley and his sanitary expertise