Plot

The creator of a scientific device is kidnapped, and his daughter enlists the help of a private detective whose investigations lead them to a remote Pacific isle where they confront the evil and shocking descendants of a long-dead pirate.

A young couple journeys to Mystery Island to rescue the girl's father, who is being held prisoner by the evil Captain Mephisto, a pirate from 200 years ago who uses his Transformation Machine to travel forward in time and disguise himself as one of the four owners of Mystery Island.—Anonymous

A breakthrough scientific device will revolutionize the world's energy usage if the kidnapped inventor can be found. To rescue her father, Claire Forrest enlists the help of ace sleuth Lance Reardon. Clues lead them to a Pacific isle, where the two confront sinister and astonishing forces. The descendants of a long-dead pirate, Mephisto are holding the scientist for their own nefarious gain. And one of the heirs has a 'transformation chair' that changes him into the molecular duplicate of Captain Mephisto.—Oscars

A breakthrough scientific device will revolutionize the world's energy usage if the kidnapped inventor can be found. To rescue her father, Claire Forrest enlists the help of ace sleuth Lance Reardon. Clues lead them to a Pacific isle, where the two confront sinister and astonishing forces. The descendants of a long-dead pirate, Mephisto are holding the scientist for their own nefarious gain. And one of the heirs has a 'transformation chair' that changes him into the molecular duplicate of Captain Mephisto. By the time Claire and Lance learn the truth about the pirate's plot, it maybe too late.