East of Sumatra: Duke Mullane, manager of a Malayan tin mine, goes to a little-known island to open a new mine in the jungle. Initially, the natives there are friendly, especially dancer Minyora...who proves to be affianced to local ruler King Kiang. Alas, a series of unfortunate incidents changes Kiang's attitude to hostility, and Duke is stranded with his crew, Minyora, and his old flame Lory...who's now engaged to his boss!