1980

When body parts start showing up in Chicago’s water treatment plant, Detective David Madison is tasked with investigating the grisly dismemberments. Based on the location of the body parts, the city is afraid there might be a killer on the loose stalking the sewers, so Madison and a young cohort traipse down into the muck and mud under the city in search of clues. Naturally, they’re expecting to find a human, but what they discover instead is a ginormous 36-foot long Alligator named Ramone with a serious case of the munchies. Perhaps predictably, nobody believes Madison’s claims of “an alligator did it!” when he comes back up from the sewers sans partner, but after a nosey newspaper reporter manages to get photographic evidence of the creature, not only is Madison vindicated, but the entire city kicks into high gear to try to figure out a way to stop the beast before it consumes anyone else.