A big city cop from LA moves to a small town police force and immediately finds himself investigating a murder. Using theories rejected by his colleagues, the cop, John Berlin, meets a young blind woman named Helena, who he is attracted to. Meanwhile, a serial killer is on the loose and only John knows it.
A baby alligator is flushed down a Chicago toilet and survives by eating discarded lab rats, injected with growth hormones. The now gigantic animal, escapes the city sewers, and goes on a rampage, pursued by a cop and a big-game hunter.