Smuggler's Island plot
"Pirate Port of the China Seas!"
Former Marine Steve Kent struggles to survive in Macau with his diving company. One day he is approached by the attractive blonde Vivian Craig. Vivian plans to hire Steve and his boat to salvage a consignment of medicines from a crashed plane. This aircraft crashed into the ocean on a flight from Manila. Steve eventually dives for the downed plane, but discovers he's been tricked into bringing up a batch of gold bars instead of medicine. He plans to report this to authorities, but Vivian's advances quickly change Steve's mind. Then Vivian's wife Allan suddenly shows up and it is decided to ship the gold bars to Hong Kong. Along the way, the trio is ambushed by buccaneers led by the villainous Bok-Ying.