In the first of these B-horror flicks, Voodoo Island, Boris Karloff leads an investigation into mysterious disappearances on an island that's the site for a future resort. But after carnivorous plants and zombies begin to chomp away, real estate prices (and life expectancies) plummet. In The Four Skulls of Jonathan Drake, a centuries-old family curse is visited on two brothers as they attempt to unravel the mystery behind the sinister spell.