The substitute teacher of the future is a robot who answers spit-wads with bullets. He'll clean up the gang situation at the school, too, if a government agent doesn't catch him first for an experimental robot army.
In the original movie, the cyborg-teachers were all destroyed... except for one rogue military robot determined to clean up the education system.
The Maniac Cop returns from the dead once again when a female cop is shot down during an attempted hostage rescue. This time the Maniac Cop wants a girlfriend, and nothing will stop him from finding one! Mayhem and carnage ensues as the zombie officer finds his undead and unwed partner, but it's not all plain sailing for the gruesome twosome when some real cops attempt to hunt them down.
A disfigured psycho law enforcement officer continues his reign of terror, as the good cops endeavor to put an end to his activities. By way of a plot, a hush-hush conspiracy is thrown into the proceedings.