Mrs. Anna Leonowens and her son Louis arrive in Bangkok, where she has been contracted to teach English to the children of the royal household. She threatens to leave when the house she had been promised is not available, but falls in love with the children. A new slave, a gift of a vassal king, translates "Uncle Tom's Cabin" into a Siamese ballet. After expressing her unhappiness at being with the King, the slave decides to make an attempt to escape with her lover. Anna and the King start to fall in love, but her headstrong upbringing inhibits her from joining his harem. She is just about to leave Siam but something important she finds out makes her think about changing her mind.

Molly and Terry Donahue, plus their three children, are The Five Donahues. Son Tim meets hat-check girl Vicky and the family act begins to fall apart.