Tours of duty on secret submarines are very dangerous (in theory) but very boring (in practice). The lads of the UP-927 decide to take a little entertainment along with them for their next tour of duty. Instead of the traditional ship's cat, they've decided to go for a ship's sex kitten! Unfortunately, Bianca didn't seem too keen on coming along, so they had to "rope her in". Of course, if she'd been an upstanding honest citizen the top brass would never have stood for it, but they knew that Bianca had been spying for the enemy- and they figured that this would be her just desserts!