A vigilante ex-con is determined to clean up his crime-infested community. As he avenges the death of his sister, he begins a series of actions that may lead to his own destruction.
Un météore se crashe dans un lac de l'Oregon, dans lequel se trouve un oeuf de dinosaure. La chaleur du crash entraine l'éclosion de l'oeuf, et le dinosaure, sortant de l'eau, sème la terreur dans la région...