Danni Arslow is a porn star who arrives with director Derrick Jones (Jerry O'Connell) to shoot some Girls Gone Wild-style debauchery on the fictional Lake Victoria, Arizona. As a porn star, she is inherently promiscuous, and in the movie she  fools around with Crystal Shepard (played by real-life porn star Riley Steele). So, of course, they both end up as Piranha feed.