The tale of rock band KISS and their efforts to thwart a diabolical plan by mad scientist Abner Devereaux. Devereaux has found a way to clone humans into robots in his laboratory at an amusement park. It just so happens that he plans to uses the KISS concert as a platform to unleash his plan on the world. KISS must use their special powers to stop him.

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.