Following the cult monster movie classic The Creature from the Black Lagoon, this is the final film in the ultimate B-Movie monster trilogy. For this, the final part of the series, a group of scientists take a trip to find the sinister Gill Man, capturing him for further medical experiments. When the Gill Man is accidentally set on fire, a deranged scientist realises he can change the creature to become more human than fish. Put on display as a freak, the Creature escapes and embarks on a trail of revenge and destruction...