After an undersea earthquake, a baby sea monster is captured off the Irish coast. A group of promoters put this monster (dubbed Gorgo) into a circus. 2001's Heywood Floyd (William Sylvester) suffers some general compunctions about the proceedings but goes along with them. As with King Kong, flashbulbs provoke the monster, and he goes on a rampage. Shortly after this, Gorgo's mom shows up and destroys several London landmarks in the process of rescuing him. The movie ends "happily" with Gorgo and parent lumbering off into the sunset.