Capt. Chisholm (Coltrane) is bothered by a scandalous past, so he doesn't ask a lot of questions about transporting a secret cargo to Australia. A storm strands Chisholm and two sailors on an uncharted island that's inhabited by the malevolent Ellstrom (Terry) and has Chisholm in a battle of good versus evil. Based on a novel by Robert Louis Stevenson.