Meet John Bentall .. When you get to know this tough, diffident guy who's honest enough to admit his mistakes you'll stay with him to the end. And with the beautiful girl who's posing as his wife. Together they embark on a 'honeymoon' voyage which turns out to be a series of disasters. They're dumped on a remote Polynesian island where, isolated and in acute danger, they have to pit their wits against a brilliant brain; a brain backed by sadistic Chinese henchmen. Slowly the terrible meaning of The Dark Crusader comes to light.