In postwar Germany, a displaced Czech boy, separated from his family during wartime, is befriended by an American GI while the boy's mother desperately searches for him.

Widowed Welsh mother Anna Loenowens becomes a governess and English tutor to the wives and many children of the stubborn King Mongkut of Siam. Anna and the King have a clash of personalities as she works to teach the royal family about the English language, customs and etiquette, and rushes to prepare a party for a group of European diplomats who must change their opinions about the King.