Hominid sites, their geologic settings1981

Archaeologist David Isaac joins a team excavating a crypt on a remote island where a colonial-era family lies buried. By local lore, the family were "devils." The expedition's leader hopes to revive his career by proving they were murdered by neighbors in a burst of religious hysteria. But these cadavers harbor an older and deadlier secret. And no one is prepare for what is about to emerge...