With Stockman showing up in the middle of the final battle, our heroes must temporarily join forces with the Shredder to defeat his exo-suit before he annihilates them all. With everything working against them, high atop the Shredder's skyscraper, can our turtles emerge victorious?! And what roll does the Sword of Tengu have to play?

After the frustrated Turtles exhaust their search for Splinter, their suspicions turn to the Guardians, and the trail soon leads them to a non-descript building, the initials of its company name spelling out "TCRI".