Pirates force a young prisoner to join their bloodthirsty crew.

In the 18th century, Jonathon Standing, the heir of the leader of a Huguenot settlement on a Caribbean island, is unjustly accused of immoral conduct with a married woman who drowned herself. Imprisoned in a penal colony, he escapes and falls into the hands of a band of pirates. Their leader, LaRoche, believes the Huguenots have a treasure concealed on their island and forces Jonathon to lead him to the settlement. A battle ensues, and LaRoche methodically executes the captured Huguenots in the hope that they will reveal the whereabouts of the treasure; but some of the settlers, including Jonathon's half sister, Bess, and her fiancé, Henry, manage to escape into the jungle. When LaRoche discovers that a large statue of Jonathon's grandfather is made of solid gold, he and his crew drag it to the beach. While they are floating it on a raft, Jonathon, Henry, Bess, and other settlers ambush them, and the statue sinks. Jonathon kills LaRoche and the pirates and returns with Bess and Henry to the settlement.