Thomas H. Ince Jr.

In the South Seas, a half-caste island girl refuses to follow tradition and marry a fellow islander, instead falling in love with a white man and heir to an American fortune.

When Tim Hanlon arrives to tell Ruth McArthur her long lost brother has been killed, she mistakes him for her brother. He stays on to help her retain control of the dam her farther started. But DeLong is after the dam and having had McArthur killed, he now sends his man after Tim.