Captain Horatio Hornblower R.N.

In 1807, Horatio Hornblower commands the 38-gun frigate HMS Lydia on a lengthy secret mission to Central America. He is to provide arms and support to a megalomaniac named Don Julian Alvarado, who is calling himself "El Supremo" (Alec Mango), in his rebellion against Spain, an ally of Britain's enemy France. Lady Barbara Wellesley (Virginia Mayo) and her maid, fleeing a yellow fever epidemic, transfer to the Lydia. On the voyage back to England, they fall in love, but he tells her he is married. After arriving home,