This is a real psychological study. Poor Jurgen ends up with a couple of beautiful, two bit performers who coerce him into taking them to Barbados. Unfortunately, the trip is four weeks and along the way, their personalities begin to clash, with deadly consequences. One is selfish and jealous, the other grows strong but has a psychotic side. Prochnow's Captain is Diabetic and this proves to be the biggest complication when one of the jealous females decides to use it against him. The dynamics on board are interesting. Both women are gorgeous, which complicates things as well. There is sexual tension all over the place. The name of the ship is "Bella Donna" which, of course, is a plant that is used to extract deadly poison. The movie does work pretty well as the three do everything to destroy what there is between them. I won't spoil the ending, but it certainly grabs the viewer.