Plot
From Wikipedia, the free encyclopediaA year after the attack on Lake Victoria by prehistoric piranhas, an eradication campaign has left the lake uninhabitable by life, and the town itself has been largely abandoned as a result of the drying-up of their main revenue source, tourism.
At a nearby lake, Clayton (Gary Busey) and Mo (Clu Gulager), two farmers walks into the water to recover the body of a dead cow. Eggs laid inside the cow hatch, and the farmers are killed by a swarm of piranha.Maddy (Danielle Panabaker), a marine biology student, returns home for the summer to the waterpark she co-owns. She finds to her horror that the other co-owner, her step-father Chet (David Koechner), plans to add an adult-themed section to the waterpark with 'water-certified strippers', and re-open it as "Big Wet." At a party at the waterpark that night, Maddy encounters several old acquaintances, including her policeman ex-boyfriend Kyle (Chris Zylka), and Barry (Matt Bush) who has secretly had a crush on her since grade-school. She also runs into two of her close friends, Ashley (Meagan Tandy), and Shelby (Katrina Bowden).
Shelby and her boyfriend Josh (Jean-Luc Bilodeau) go skinny-dipping in the lake, where a piranha makes its way inside her vagina. Meanwhile, Ashley and her boyfriend Travis (Paul James Jordan) go to have sex in their van. They accidentally trip the handbrake, causing the van to roll into the lake, where they are both devoured.The next day, Maddy is consoling Shelby about their missing friends. While sitting on a jetty, they are both attacked by the swarm of piranhas. They manage to kill one, and Maddy, Kyle and Barry bring it to Mr. Goodman (Christopher Lloyd) to examine. He informs them that the piranhas may be moving via sewage pipes and underground rivers between lakes. The trio return to the lake, where they establish that the piranhas cannot make their way into the outflow pipes connecting the lake and the waterpark.
While Shelby and Josh are having sex, the piranha in Shelby's vagina bites Josh's penis, forcing him to chop the organ off with a knife. Both are hospitalised. Kyle is revealed to be corrupt and taking pay-offs from Chet, who is secretly pumping water from
an underground river into the waterpark.
Discovering the connection between the park and the underground river, Maddy attempts to shut the waterpark down, but is stopped by Chet and Kyle. The piranhas make their way
to the area and attack, killing many of the lifeguards and waterpark-goers. Deputy Fallon attaches a shotgun prosthesis to his legs in order to save the visitors, while Hasselhoff, after rescuing a small boy, becomes pleased that he has finally become a real lifeguard. In the chaos, Chet is killed by a low-hanging cable after attempting to drive away and escape.
Barry begins to drain the pools; however Maddy, who is rescuing people from the water, becomes caught in the suction and dragged down to the bottom of the pool. After Kyle refuses to save her, Barry, despite being unable to swim, leaps down and brings her to the surface, where they kiss.
Another employee pours gasoline into the pipes, followed by a lit cigarette. The resulting explosion kills most of the piranhas, while Kyle is killed by a falling trident. The celebrations are cut short however, when Maddy takes a phone-call from a horrified Mr. Goodman, who informs them that the piranhas are evolving and are now able to move on land. The film ends as one such piranha emerges from the pool and decapitates a young boy taking pictures of it.Cast
Danielle Panabaker as Maddy
Matt Bush as Barry
David Koechner as Chet
Chris Zylka as Kyle
Katrina Bowden as Shelby
Gary Busey as Clayton
Christopher Lloyd as Mr. Goodman
David Hasselhoff as himself
