A self-appointed vigilante, wearing a hockey mask and named Casey Jones, is striking fear in the hearts of the city's criminals. However, the legal system feels that this same vigilante is violating the civil rights of said criminals, therefore, the Police, who believe that the Turtles are responsible, issue an All Points Bulletin. Mr. Thompson calls April at her apartment at five in the morning to assign her the story -- she accepts, but only to prove the Turtles' innocence. The Turtles have also had their own run-in with the vigilante and, realizing how easy it will be for people to confuse him with them, elect to try and stop him. Meanwhile, Krang has developed an army of tiny mechanical insects designed to infiltrate the city's machinery, thereby having access to control it.