Set in the India of the British Raj, the evil and untrustworthy Prince Guhl (Raymond Massey) plans to wipe out the British troops as they enjoy the hospitality of Guhl's spacious palace. It's up to the loyal young Prince Azim (Sabu) to warn the troops of Guhl's treachery by tapping out a message on his drum.

In Tangier, disgraced American war correspondent Paul Kenyon, café dancer Rita and local entrepreneur Pepe join forces to battle a Nazi diamond smuggler.

When Prince Ahmad is blinded and cast out of Bagdad by the nefarious Jaffar, he joins forces with the scrappy thief Abu to win back his royal place, as well as the heart of a beautiful princess.