Mara Maru plot
"Tropical Treasure! Typhoon and Temptation!"
Gregory Mason, a scuba diver in Manila, the Philippines, finds his business partner Andy Callahan drunk. Andy brags about a treasure of diamonds. It seems that someone wants that treasure at all costs and kills Andy during a boat trip. Gregory, who is attracted to Andy's wife Stella, is accused of this and that seems to be the intention. Despite private investigator Steven Ranier being able to exonerate him from Andy's murder, Gregory is then drawn into a conspiracy that somehow involves the sinister Brock Benedict, the mysterious Ortega, Andy's widow Stella and even the private investigator. .