A sailor, John Corwell, discovers gold in New Guinea and conveys the news to Governor Phillip. Phillip provides the means for Corwell to repair his ship and mount an expedition to mine the gold. Accompanied by his wife, Corwell takes his four European crew members into his confidence once they reach New Guinea, but excludes the rest of his crew. When they discover the secret purpose of the voyage the men devise a plot to seize the gold for themselves.