After the terror unleashed on Lake Victoria in PIRANHA 3D, the pre-historic school of blood thirsty piranhas are back. This time, no one is safe from the flesh-eating fish as they sink their razor-sharp teeth into the visitors of the summer's best attraction, The Big Wet Water Park. Christopher Lloyd (BACK TO THE FUTURE), reprising his role as the eccentric piranha expert, along with survivor Paul Scheer (TV's THE LEAGUE) are back for more fish frenzy. David Hasselhoff trades in the sandy beaches of TV's BAYWATCH to be a celebrity lifeguard at the racy water park. Prepare for double the terror, double the action, and double the D's in this sequel.