Sadistic Stephen Danel owns a penal island, and when he is not humiliating and mistreating his wife, he is torturing his convict prisoners and using them for slave labor. Government agent Mark Sheldon is sent to infiltrate the island and bring Danel to justice.
Island of Doomed Men
Undercover agent Mark Sheldon gets paroled to a remote tropical island with a diamond mine manned by slave labor run by sadistic Stephen Danel.