Nazi saboteurs have burned down Charlie Chaplin's studio - just as his Hitler-bashing masterpiece was nearly complete! Now he and his government handlers - undercover agents and Hollywood sex symbols Hedy Lamar and Errol Flynn - are England bound, hoping to covertly finish shooting there. They set out to cross the Atlantic in a secretive, low-profile yacht voyage, but the Fuhrer has a spy on the side of the angels, and there's a fleet of U-boats following in their wake!