Though it was once a wholesome, family-oriented attraction, a
water park owned by Chet (David Koechner) now features a nudist pool and
aquatic strippers. Chet's daughter, a marine biologist named Maddy
(Danielle Panabaker), is unhappy about the changes but is powerless to
stop the grand reopening. However, when a school of
ravenous, prehistoric piranha migrate over from nearby Lake Victoria,
Maddy must somehow prevent the park's patrons from becoming fish food.
