Lt. Glenn Hoffmann is the the fun-loving leader of a bunch of oddball, acrobatic G.I.s whose mission is to steal the German's secret attack plans from a villa behind enemy lines, where they run into a brutal Nazi commander.

The evil King Zagro has designs on the beautiful Princess Sira. He wants to marry her so he can take over her kingdom and add it to his own. When Sira is kidnapped, Ursus leaves his farm to rescue her and to eventually lead a revolt against King Zagro.