A chemist experimenting with different formulas stumbles upon an ingredient that, when added to beer, makes it absolutely irresistible. Before he realizes it, an international spy is after him to try to get the formula for himself.

After being busted out of jail by his tomatoes, Professor Mortimer Gangreen begins a new plot to take over the world by inserting his hapless lackey Igor into the throne of the King of France.

Crazy old Professor Gangreen has developed a way to make tomatoes look human for a second invasion.