Wrongfully imprisoned for a crime he didn't commit, Minnesota Clay seeks revenge on the man who withheld evidence at his trial. There is a problem however, he is going blind.
An electronic ray that can counter any aerial attacks has just been invented by Professor Goodwin, but before he can put in good hands, he is kidnapped by a criminal organization, that ...
A serial killer called "The Hyena" is finally caught and eventually hanged. However, his body disappears before it can be buried, and soon thereafter dead bodies start turning up in a small village.