Tom Butterworth is determined to be the youngest cruise ship captain in history - even if this means sailing on a converted gunboat named "Vengeance" with a crew of rejects from Maritime High School, and a trio of girl singers who are passing themselves off as a famous show biz act. The engineer is seasick, the cruise hostess is pulling her hair in frustration, and a gung-ho nurse is practicing giving hypos by stabbing anything that's handy. And the passengers, well, they're a pretty unusual bunch! There's a fabulous Hollywood star, Honey Hotchkiss a clumsy pair of thieves a lady who loves pets but is allergic to fur and a non-stop jogger. To top it all off, there's a hijacking by a misguided group of pirate loonies. By the final curtain, it's all romance and laughter. The set is simple, the dialogue easy to memorize, and the plot is designed for easy rehearsals.