When Manhattan mysteriously begins to shrink during a live broadcast from Liberty Island, Shredder seizes the opportunity to reveal himself as the architect of the catastrophe. He claims control of the Hyperstone, a powerful artifact from Dimension X, and threatens global domination with its reality-warping abilities. The Teenage Mutant Ninja Turtles must pursue their arch-nemesis across the city's chaos to recover the stone and prevent Shredder from reshaping the world to his design.