In Lust Vessel, you play Kate, who is a literature major. She wakes up while on a cruise on the "Fun Space Fun" and you can't remember what happened the day before and you have a horrible hangover to boot. For some reason, the whole ship is now full of sex maniacs. Kate has to find her best friend and find a way off this sexy crazy cruise. Along the way, you'll find lots of other characters that will either help you or try to hinder your way off. You can choose to either let Kate give in to sexual urges or have her be able to resist them.