When Kate Sullivan storms a hostage situation, the whole incident is captured on tape by an unscrupulous media crew who edit the footage to show her killing a helpless victim. "Maniac Cop" takes it upon himself to exact revenge upon those who smeared her name.

After being framed by corrupt superiors and brutally assaulted in prison, Officer Matt Cordell teams up with a vicious serial killer to track down those that wronged him.