Shredder tries to trick the Turtles into eating cookies made with anti-mutagen. The mutagen is supposed to change the Turtles into human weaklings so Shredder can destroy them. Donatello discovers what the cookies are made of and throws them away warning the Turtles that the mutagen is unstable. Michelangelo wanting to be a human, tries one of the cookies and it mutates him into a teenager. As a human, he meets with April who is working undercover in a gang. This gang, lead by Lugnut, happens to be the one that Rocksteady and Bebop used to belong to. Bebop and Rocksteady ask them to steal electronic parts from an abandoned tanker for the Technodrome. Michelangelo is having problems with the mutagen being unstable. He keeps changing from human to Turtle at the most inopportune times. April sees him at one of those times and discovers who he really is.