After a man turns up dead at a peculiar carnival, police suspect Goliath, the world's largest -- and angriest -- gorilla. But as more killings ensue, it soon becomes clear that nearly everyone in the carnival has motives for murder. Suspects include star trapeze artist Joey Matthews (Cameron Mitchell), sultry siren Laverne Miller (Anne Bancroft) and her husband, Cy (Raymond Burr). Lee J. Cobb and Lee Marvin co-star as cops on the case.