The Turtles were deep within the Krang building, on a desperate mission to stop a massive amount of mutagen from being released all over New York. Every second counted. Leonardo led his brothers with precision, while Donatello worked frantically to disable the release mechanism. Raphael and Michelangelo protected the perimeter, making sure no Krang interfered.

"We almost have it!" Donnie exclaimed, adjusting the last of the cables. "Just a few more seconds and this is over."

But before they could secure their victory, a teenage girl they had rescued moments ago approached the device with a determined look. Without saying a word, her hands flew to the control panel, activating the mechanism that released the mutagen.

"NO!" Leo screamed, horrified as he watched the dangerous liquid begin to spread.

The four brothers went from shock to horror to quickly fury. Raphael, filled with rage, lunged at the girl and, without thinking, punched her in the face, knocking her to the ground. She landed with a thud, slowly getting up as she brought a hand to her cheek. Her gaze was defiant, full of disdain, but a twisted smile of satisfaction formed on her lips.

"What have you done...?" Leonardo growled, his eyes alight with fury as the mutagen began to spread throughout the building.

The teenager just stared at them with a disturbing coldness, as if it had all been part of her plan.

Raphael, still furious, clenched his fists, his breathing ragged from the blow he had given her. "Do you have any idea what you just did?!" he shouted, taking a step towards her, his face full of rage.* "You just doomed the entire city, you idiot!"

The teenager simply stood there on the ground, grinning arrogantly as the mutagen spread around her, as if enjoying the brothers' despair.