Yönetmen : John Gulager Oyuncular : Danielle Panabaker, Christopher Lloyd, Jean-Luc Bilodeau, Ving Rhames, Katrina Bowden Senaryo : Patrick Melton Yapımcı : Joel Soisson, Mark Canton

Maddy ve arkadaşları Barry ve Kyle doğal bir park alanındaki göle yüzmeye giderler. Fakat bu göldeki en vahşi insan yiyici pirina balıklarından habersizdirler. Having awoken from their spring break extravaganza at Lake Victoria, the swarm heads upstream where they look to make a meal out of Big Wet, a local water park where when it comes to fun, nobody does it wetter! Though they came to get wet, get loaded and get some, the staff and patrons get more than they bargained for when they must face the fiercest, most bloodthirsty piranhas yet. Lead by the strong-willed, studious Maddy and her friends, Barry and Kyle, the trio must dive in and take on these man-eating creatures using every ounce of their being but can they be stopped?