Kathy's father is intrigued by the stories Umbopa, a man they meet on their way to the South African coast, tells them about Solomon's diamond mines. So, he steals away in the night, leaving Kathy with a group of relative strangers. To find her father, Kathy enlists the help of hunter Allan Quatermain for a journey to the mines, where they are met with some less than hospitable natives -- who do not plan on making their task any easier.