When a giant alligator begins terrorizing a city, a detective and a group of hunters must stop it before it kills more people. As the creature wreaks havoc, the police and the protagonist face obstacles, including toxic waste and skepticism from the public. They must work together to find and defeat the dangerous creature.

When a baby alligator is flushed down a toilet, it grows into a giant monster in the city's sewers. As it starts attacking and killing people, a female police officer and a reptile expert team up to stop the creature before it causes more destruction.