When the nefarious Dark Helmet hatches a plan to snatch Princess Vespa and steal her planet's air, space-bum-for-hire Lone Starr and his clueless sidekick fly to the rescue. Along the way, they meet Yogurt, who puts Lone Starr wise to the power of "The Schwartz." Can he master it in time to save the day?

A bad Polish actor is just trying to make a living when Poland is invaded by the Germans in World War II. His wife has the habit of entertaining young Polish officers while he's on stage, which is also a source of depression to him. When one of her officers comes back on a Secret Mission, the actor takes charge and comes up with a plan for them to escape.