In this 7th and last film of “The Road To” series, with their vaudeville act going nowhere, Harry Turner (Bing Crosby) and Chester Babcock (Bob Hope) decide to become con artists, except Chester is having a few problems with his memory. Luckily, Turner and Chester find a miracle drug in Tibet that cures Chester. When he memorizes a secret formula for space travel with his improved mind, however, a whole host of other problems crop up, accompanied by an alluring spy, Diane (Joan Collins).