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Bob Elliott (Edward Norris) escapes the plunging cargo by jumping overboard. Returning to the Silver Star with the Tambosa constabulary, the young American finds no trace of Pamela (Lois Collier) and Chuck (Eddie Quillan), who have been stashed away behind a secret panel. But Bob does not give up that easily and returns a third time. Dr. Elise Bork (Tala Birell), meanwhile, has gotten rid of the demanding Captain Drake (Oliver Blake) and is contemplating killing Pamela when interrupted by the arrival of Bob. The latter, however, walks right into a trap set by the now very late captain: an automatic rifle activated by a trip-wire.