In pursuit of stolen aircraft engines on a Central American island, federal agent Rigby meets chief suspect Hintten and his wife Elizabeth, a sultry cafe singer; and is watched by Bealer, a "pie-shaped man" with sore feet. Rigby knows he's on the right track when Bealer offers him money to leave Carlota. When Rigby and Elizabeth are drawn to each other, the gang realizes there's more than one kind of bribe. Everybody sweats.

In 1862, a young Englishwoman becomes royal tutor in Siam and befriends the King.