Buck Roberts is leading a wagon train of railroad supplies and Jim Corkle and his henchman Loder are out to stop them by using white men dressed as Indians for the attacks.

When a gambler is accused of murder, the pretty orphanage employee he loves sets out to prove him innocent of the crime.

A Maritime Board of Inquiry investigates the loss of the merchant ship, the Black Rover . Its captain, Jim Parker, offers the following testimony on his own behalf: Jim is recommended by Fred Winthrop to his father, owner of the Winthrop Shipping Line, to command the Black Rover after its captain and crew refuse to make the voyage. Jim, who has just received his captain's papers, agrees, unaware that Winthrop is illegally running a cargo of contraband weapons. The film has never had a theatrical release. Production began in 1930 under the title "Contraband," stopped when the producers ran out of money, then began again under the title "Contraband Cargo." Production soon stopped again and was not resumed until 1939, when new footage was shot and footage from HELL HARBOR (1930) was edited in. The film was still deemed not suitable for theatrical distribution, and it was not until 1949 that it was finally released... for late night airing on television.

Mark Russell, captain of a ship sailing from the South Seas to San Francisco, is an innocent victim of a pearl-smuggling scheme by Harry Gibson, and when the pearls are discovered by customs inspectors, Russell takes the blame because of his love for Gibson's sister Eve and to shield her of being disgraced.