Shredder breaks into the Ninja Hall of Fame and steals the diary of the infamous Brothers Kojima.
He leaves his fingerprints all over the place though, and one Lt. Saki finds them: Shredder's brother!
Burdened with his evil brother's past, and present sins. Lt. Saki vows to bring in his sibling, and travels to America to track him down. He meets up with the Turtles by accident at the Nuclear Fusion Reactor. Where they are safeguarding a new super-magnet, which they suspect might be Shredder's next target.
But all chance of an alliance between the two forces are soon hampered by lt. Saki's obsession with doing things ""by the book"", preventing the green machine from breaking the law in efforts to stop shredder.
Shredder creates holograms of the Kojima Brothers, and programs them with ""the greatest secrets of the three great ninja master of all time"". The brother's keep the TMNT busy long enough for Shredder, rocksteady and bebop to break into the nuclear fusion reactor and acquire the su