On the South Sea island of Somona, an American rough-and-ready hero, Sylvester Todd, punches a German prince for insulting Lady Diana Loring of England. Sylvester flees the island, and at the request of an English official, sails to another province to help quell a native uprising. The German foreman of an English platinum mine on the island plans to destroy it with the assistance of the natives. When Lady Diana arrives, Sylvester takes her and several other English friends to a chateau for safety, but the building is surrounded by the rebels. Sylvester escapes to a wireless station and sends off an appeal for help. The party is rescued by an American warship, after which Sylvester and Diana marry.
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