In a peaceful water park in a small town, life seems to be a torrent of fun and adrenaline. However, tranquility is disrupted when ancient predators rise from the depths of a nearby lake. A group of prehistoric piranhas has returned, seeking to quench their thirst for blood, leaving the swimmers in a mortally amusing situation.
Young Maddy, the owner of the park, faces the challenging task of saving her business while dealing with the imminent threat. Along with her aunt, she tries to transform the park into an unforgettable summer destination, but as the piranhas start devouring unsuspecting visitors, chaos ensues. With an eccentric cast of characters ranging from unconventional lifeguards to wacky tourists, the fun quickly turns into a struggle for survival.
Amidst scenes of frantic action and moments of grotesque humor, the group of survivors tries to find a way to eliminate the beasts before they turn the park into a bloody feast. As the carnage intensifies, the townspeople must set aside their differences and unite to confront the horrifying creatures, making it clear that sometimes, aquatic fun can turn deadly. With an explosive cocktail of special effects and an irreverent tone, the film promises to keep the audience on the edge of their seats, laughing and screaming in equal measure.