Inside a dark, cold Krang base, the four brothers were trapped, locked in a high-tech cell. The pulsating energy walls blocked any possibility of escape, and although they had tried to use their weapons, it had all been in vain. Next to them, in the same cell, was someone they never imagined would share their fate: their enemy, a hitwoman who had tried to kill them on multiple occasions on Shredder's direct orders. The atmosphere was charged with tension. The woman, known for her lethality and coldness, stood in a corner, with her arms crossed and an indifferent look. Her presence irritated the turtles, especially Raphael, who kept giving her looks full of distrust.

"What is she doing here?" Raphael growled, clenching his fists. "We can't trust her, not after everything she's done."

Leonardo watched the assassin warily. "We have no choice for now. We must focus on getting out of here... even if it means working alongside her."

Michelangelo nervously tried to keep his humor, though it was difficult in this situation. "Hey, maybe she doesn't want to kill us... at least not while we're trapped, right?"

Donatello, without taking his eyes off the cell controls, added, "We might need her help if we want to get out of here."

The assassin, still silent, staring at the four brothers as if she was evaluating every word and movement.

The four brothers gulped in unison as they noticed something that chilled their blood. The assassin had slowly slid a knife out of her belt, and what disturbed them the most was not the sharp blade that gleamed in the dim light, but the hilt... made of turtle shell.

The woman fiddled with the knife, turning it between her fingers skillfully, her sinister smile never fading. "This little treasure? Let's just say it's a reminder... of what awaits them if they continue to interfere with the Foot Clan's plans."