A/N: I haven't got a lot of reviews, but it sure looks like it's being read. So, thanks!

"So, what does it do Donnie?" Leo asked.

Donatello set down his tool, his expression one of slight admiration. "It's a very sophisticated communications device. It relays both audio and visual information. And Kaz was right, it is transmitting an ultrasonic signal. Well, when it's working it does."

"And how is that gonna help us find Kaz?" Raph groused.

Behind him, Mikey leaned in the doorway, Kala tucked under his chin. He was beginning to feel the edge of despair. It seemed like every time they got close to his son, he'd slip through their fingers. And now Kaz had gone off on his own to fight an entire gang by himself. What exactly was he trying to prove? Whatever it was, Mikey had a terrible gut twisting suspicion it was going to get him killed.

Donnie sighed. How many times did he have to explain these things to his brothers? "It means we can follow it back to its source."

Leo straightened. "But I thought it was broken."

"It was. I fixed it."

Mikey shifted Kala in his arms as he stood a little straighter, his jaw clenched. "Then what are we standing here for?"

Leo nodded, his gaze shifting to Raph. "Yoshi better come along this time. I have a feeling we're going to need everyone."

As the lab began to empty, Donnie put a hand on Mira's shoulder. "I'd like you to stay here."

Her mouth opened and closed in astonishment for a moment and then she glared. "What!"

"Mira, sweetie. I have a feeling things are going to get really bad out there tonight. I need you to stay here and prep the lab." He squeezed her shoulders. "Please, don't argue with me."

Mira glanced past her father at K-three who'd stopped in the doorway. The Turtleoid gave a slight nod and she could feel his protectiveness sweep over her. He wanted her to stay just as much her father. She frowned. "Mom can prep the lab."

Don frowned as well. "She can but she could use your help, especially if something happens to me."

K-three stepped up beside Don. "He's right, Mira. You're needed more here than out there."

Donnie nodded and Mira sighed. She wasn't used to being left behind. "Okay."

Her father smiled and hugged her, kissing the top of her head. "Thanks sweetheart."

He left and K-three frowned at his mate. He could feel her unhappiness. He lifted her chin and kissed her softly. "You know how I feel about you fighting." She nodded. She knew it made him anxious and scared and maybe even a bit distracted. "Do you remember what we talked about the other night?"

Her cheeks tinted pink. "Yes."

"Well, when this is over, let's do it."

Her love flooded over him like a tidal wave while her eyes glowed. "Really?"

He smiled. "Really." He kissed her again, pulling her petite body against his.

"Be careful." She whispered against his lips.

He pulled away with a smirk. "I always am." She snorted at his insinuation that she was the reckless one. He just chuckled and took her hand, leading her into the living room. The guys were already climbing into the elevator and K-three released her hand to follow. He met her gaze as the doors closed and his love flowed over her like a warm blanket.

The room seemed deathly quiet as if each of the women remaining had an ominous feeling. Shinta watched them from the dojo's doorway. He was getting to the age that knowing his family was going into battle without him was really starting to trouble him. He'd been training with his katana now for two years and even his father said he was doing excellent. But still he was forced to sit on the sidelines and watch the others risk their lives.

The slight resentment he was feeling faded as he watched the girls settle on the couch, their faces strained with worry. If he was forced to remain behind then he would do his best to watch out for them, to protect them while the others were away.

"What did you do to her!" Kaz clenched his fists, fighting down the desire to spring forward and rip the man's head off right there.

Lanius eyed him. "Such concern. Do you know her?"

"Answer the question. What did you do!"

"I merely removed those things that would inhibit her. These filthy little street urchins have no worth to the outside world. But I give them purpose, food and shelter. Now that the slate is wiped clean I can reprogram her mind to do exactly as it is told."

"How dare you! Who do you think you are to steal people's memories – people's lives! Those memories are theirs – good and bad!" Kaz took a step forward, his muscles flexing in the room's bright lights. It wouldn't take much to break this scrawny man in half. And he deserved it after what he'd done.

Lifting his wrist, Lanius spoke into his mike again. "Drake, Lewis come to me." The doctor gave Kaz a look of boredom as he walked to a board with switches and dials. "Your companion here has just been the first female to undergo my procedure. I had hesitated to use it on women. They process memory so illogically. Males compartmentalize it and thus the area of the brain that must be wiped is far smaller. Whereas females use every part of their brains to story memory. Touch, smell, even sound can be related to a specific event or memory."

Kaz growled, taking another step forward. "Thanks for the lecture, but so what?"

"I'm telling you this because it means I had to expunge a significant portion of her brain." He frowned, his sunken eyes cold. "I certainly hope it wasn't too much." He started to reach for a switch to begin the second phase of brainwashing. A shuriken embedded itself in the control board mere centimeters from his hand. He looked up, glaring at the turtle.

But Kaz's glare was darker. "I won't let you do anything else to her!"

A door at one side of the room opened and two large men entered. Kaz was surprised not to see the signature eyepiece on either of them. "You called boss." One said as he stepped up next to the doctor.

"Capture this creature. I believe his brain will prove particularly interesting." Lanius smirked as the two men began to encroach on the turtle.

Kaz grinned, pulling his kusarigma. These guys were obviously not brainwashed, which meant they were acting on their own. He lazily twirled his blade. "You guys have no idea who you're messing with."

One cracked his knuckles. "Neither do you."

The other snorted. "What's with the weird costume?"

"Dude, this is no costume. I'm a turtle and you're about to get shell-shocked." The first man charged and Kaz sidestepped letting his momentum carry him to the ground. Kaz snickered as he dodged several blows by the second man. "Where'd you guys learn to fight on a bubblegum wrapper?" The first man had gotten to his feet, but was quickly taken down again as Kaz's chain wrapped around his foot and pulled him off balance. The second man tried to grab the turtle from behind while he was distracted, but Kaz swept his leg behind him sending that man to the ground as well. The young turtle shook his head. "Man, you dudes need to practice more. My little cousin can fight better than that."

As the two men gathered their feet again and tried another round of attacks, Lanius scowled and reached for the controls. Another shuriken stuck into the control panel. Kaz shook a finger at him as he punched one of the guys. "Uh-uh, doc, I don't think so!" The turtle was drawn back into his fight when one of the men tried to kick him.

Lanius's scowl only deepened. His men didn't seem like they were making much progress. It was time to even the odds. He crossed the room to a drawer beneath one of the panels.

Kaz didn't see the doctor as he approached them. The turtle sent one of the men flying across the room, but he didn't have time to think as his body was suddenly jolted with a million volts of electricity. His body began to jerk and he fell to the floor. When the searing pain ended, he still could not move. The muscles in his entire body felt like they were stuck in cement.

"Now, take care of him." Lanius growled at the men.

The first man smirked. "It'll be a pleasure." He kicked Kaz hard across the head with his steel toed boot. Blood splattered across the floor. The second man kicked him in the side with an equally steel toed boot. Kaz cringed as he felt a rib crack. His carapace and plastron protected him for major blows but his bridge was soft and malleable. It was one of his more vulnerable places. He groaned, trying to get his muscles to respond. The two men continued their attack as one kicked him in his left shoulder which was already sore. The turtle couldn't prevent the sharp cry that left him. The other man stepped on one of his hands, crushing his two large knuckles.

Kaz finally felt his muscles loosen and he grasped the hilt of his kusarigma, swinging it around to jab the blade into the man's leg. The man howled in pain and stumbled away as Kaz pushed himself to his knees. The second man was still too close as he slammed his knee into Kaz's jaw. He fell back, still not fully recovered from the Taser. The man went to kick him in the face but this time Kaz was ready, catching his foot and throwing him back with as much strength as he could muster.

Lanius glowered at the scene before him, which was already returning to its previous state. Tossing aside the Taser, he left through the main doors.

Kaz was on his feet now, blood trickling down one side of his face. His eyes glowed with fury as he sent the second man to the ground with a well-placed blow. The thug crumpled into oblivion. The man with the wound in his leg wrapped his arms around Kaz from behind, but the turtle would have none of that. He slammed a foot into the injured leg and threw him over his shoulder into a far wall, sending him into unconsciousness as well.

Kaz panted as he looked around the room, realizing for the first time that Lanius was gone. He hurried to Ona's side removing the hood and restraints. She tumbled forward out of the chair and he caught her in his arms. "Come on, Ona. You have to wake up. Come on. You can do it." A touch of fear raced through him as her eyes fluttered slightly. If what Lanius had said was true, she wouldn't know him. She might be frightened and not trust him. The last time she'd gotten a chance to know him before she'd seen him in all his turtle glory. But this time she wouldn't know him at all.

But he couldn't just leave her there. Every cell in his body told him he had to protect her. He stroked her cheek gently. "Come on, babe. You got to open your eyes." As if the soft command was enough, she did. At first they were unfocused, fuzzy and uncertain. Then they slowly fixated him. Her hands came up to muffle the small scream.

Kaz frowned as she scrambled out of his arms and scooted back about a foot. He sighed. What had he expected her to do, throw her arms around him? He looked away shamefully. "We need to go. It's not safe here." He stood, looking up at the vent he'd come through. It would be a very hard climb with his shoulder, even if he could get his grappler up there. The ceiling was at least twenty feet in height.

He heard Ona stand behind him, but what he didn't expect was the soft voice that followed. "What… Who are you?"

He turned to her, his blue eyes soft as they met her dark brown ones. "I'm a friend. My name is Kaz."

She frowned. "Do we know each other?" She looked down at her hands. "Do you know who I am?"

Kaz's frown was deeper. "He made you forget everything. I'm sorry but I don't have time to explain. We're in danger here. We have to go." He pulled out his grappler and tried for the hole in the ceiling. It made it, but the hooks had nothing to hold to so it fell. He didn't have another opportunity to make another throw as the doors to the room opened and dozens of men flowed inside. He backed towards Ona. "Stay close and keep behind me. I won't let them hurt you."

She nodded, but there was fear in her eyes. "Okay." She whispered, her hand resting on his shell as he backed a little closer to her. She would trust this stranger- this turtle with her life.

"Looks like this is the place." Don observed as they stepped on to the roof.

"Yeah, this looks like Kaz's handy work too." Mikey picked up one of the stones that had smashed a camera.

Yoshi spotted the air vent. "Look, he must've went this way." The teen didn't wait as he leapt down the shaft.

"Damn it, Yoshi!" Raph growled as he quickly followed.

Leo frowned. "Mikey you go with them." His brother nodded before jumping down the shaft after the others. "Don, you, me and K-three are going to cause a distraction."

Donnie frowned. "Why? If they aren't on to us yet?"

"This building is full of Crew and we don't know how many. We need to split their defenses." Leo lead the way to the front side of the warehouse.

"And how do we do that?" K-three asked with puzzlement.

Leo smirked. "With a frontal assault."

Inside the air duct, Yoshi moved aside just before Raphael landed at the bottom. The teen started to move down the vent. "This way."

But Raph caught his arm. "You need to start lookin' before you leap. You're gonna get yourself killed that way!"

"Someone else used to be told that all the time." Mikey said from behind them.

"Shut up, Mikey." Raph growled.

Yoshi ignored both of them and started to move away again. "He went this way."

"How do you know?" Mikey asked.

"The dust is disturbed in this direction." Yoshi pointed out as he led the way. They found the vertical shaft and went down just as Kaz had done. But this time finding the right floor was easy with all the shouting and sounds of combat.

As Yoshi found the open grate and stared down into the room, it was hard to locate Kaz in the frenzy. But he soon spotted him, pinned against a wall with a girl cowering behind him. He was covered in blood from cuts and bruises and a large gash on one side of his head. The sheer number of attackers was overwhelming him.

Ona gripped the edges of Kaz's shell, her heart pounding as he fought to keep the multitude of hands that were grabbing at her and the fists aimed at him at bay. He turned to his right to block yet another attacker and she gasped as hand holding a knife descended on her. Kaz spun back in time keep the blow from striking her, but not in time to block it properly. The blade caught him between his collar bone and plastron. He stepped back, staring at the hilt sticking out of his skin.

Ona's scream rang in his ears as he fell to his knees and the world spun for a moment before going dark.

A/N: Ahhh! A cliffy! I'm so evil! ^_^