After their prison ship sinks in the Caribbean, a group of prisoners and a doctor wash ashore on a seemingly deserted island. They soon discover a strange couple, who invite them to stay at their house. While the prisoners plan an escape, the doctor does some investigating, and soon finds out just what the pair are really doing, and why the prisoners keep disappearing mysteriously.
Barbara Bach
as Amanda Marvin
Claudio Cassinelli
as Lt. Claude de Ross
Richard Johnson
as Edmond Rackham
Beryl Cunningham
as Shakira
Joseph Cotten
as Prof. Ernest Marvin
Franco Javarone
as Jose
Roberto Posse
as Peter
Giuseppe Castellano
as Skip
Franco Mazzieri
as Francois
Cameron Mitchell
as Decker (US version)
Mel Ferrer
as Radcliffe (US version)
Eunice Bolt
as Samantha (US Version)
