An ex-gunfighter woos two women while avenging his brother, victim of a crooked gambler.

Two window washers who are mistaken by Nick Craig, a bookie, as the messengers he sent for to pick up $50,000. Now the person he sent them to sent two of his men to get the money back but they found out about it. So they try to mail to Craig but a mix up has the money sent somewhere else and the woman who got it spent it. Now Craig needs the money to pay off one of his clients.

Lt. Col. Glenn Manning is inadvertently exposed to a plutonium bomb blast and although he sustains burns over 90% of his body, he survives. Then he begins to grow, but as he grows he starts losing his mind. By the time he stops he is 50 ft tall, insane and is on the rampage.

A mysterious hypnotist reverts his beautiful assistant back into the form of a prehistoric sea monster that she was in a past life.