 Dr.Decker comes back from Africa after a year, presumed dead. During that year, he came across a way of growing plants and animals to an enormous size. He brings back a baby chimpanzee to test out his theory. As he has many enemies at home, he decides to use his chimp,  Konga  to  get rid of them . Then Konga grows to gigantic proportions and reaks havoc all over the city of London!!