At the mighty mutant animal's base, everything was falling apart.

Leatherhead was slashing and biting at the cloaked attackers as they fought with their array of swords and blades. Vital stood in the back, watching with a smile.

Karai laid there, barely breathing on the ground, with Vine crawling next to her.

Slash ran in with his morning star to back up Leatherhead as Mondo and Rockwell stood their ground in front of the children.

"Who are you, lowlives?!" Slash yelled, running towards Vital as Rockwell launched soldiers into the wall.

He jumped away, landing next to Leatherhead with a smirk.

"Anthropocentrist or Humanist if that's easier for you to handle," Vital said, dodging attacks from Leatherhead.

"Sounds contradictory if you ask me," The alligator said before hitting him with his tail.

Irillia was growling, hitting her hands against the floor, with Kohana covering her face with a blanket. Mei and ash were wailing, and Kiba and Iris were curled up next to them in the corner.

A side member stood in the background pulling out a gun as leatherhead and slash continued their array of attacks.

Rockwell used his telekinesis to lift and throw the ones charging at them when that side member shot him in the shoulder with a dart. He screeched, eyes pulsing from his face and falling on his back while Mondo tried to block attacks with his skateboard.

Karai's chest seared with pain, but she forced herself to her knees and unsheathed her sword.

A member jumped towards April's daughter, blade in hand, only for them to be blocked by Karai's sword. Vine kicked them in the back, slamming them into a pipe as Karai gripped at her sternum.

"Get the kids. We need to get out of here." He yelled, picking up Kohanna.

Karai nodded as Leatherhead crushed an aggressor's torso in his jaws. Karai ran for Kiba, Iris, and the newborns but was forced to stop by a serrated blade aiming for her head.

She hissed as she shifted into her snake form and began to whip the barbed edge of her tail at them. They countered her moves and dodged the fangs of her snake hands.

Vine was reaching for Irrilia, but Vital ran up and yanked Kohanna from his arms, kicking him in the chest. Vital threw in the chemical gas grenade as he picked up Irrilia, who was squirming like a worm.

Slash rammed his weapon into the masked figure as Karai collapsed on herself, Shifting back to normal.

Vine groaned as his eyes focused.

"No!!" Leatherhead charged at the gang's leader with his crazy eyes before being stunned by another member's taser.

Slash ran over and swatted the taser away before jabbing his knee into the person's skull.

More of the gas was filling the room as the attackers plucked up Dakota and Cody.

"You monsters!" Vine yelled, using his shirt as a filter before charging at them.

Karai gagged on the air around her as her vision went blurry.

"No, I can't!" She grit her teeth, using all the strength she had left to push herself off the concrete.

Vine aimed many blows, but they were all avoided as the enemies would seem to disappear into the gas every time they countered.

With Iris and Kiba behind her, Karai took some throwing stars and tossed them at a soldier, making him hiss and faceplant into A wall. A wail was heard beside them as Slash fell to the floor hacking and gagging. Someone had gotten a hold of Mei and ash.

Vine growled, trying to steady his breathing.

"You will never get away with this!!" Karai yelled before landing a kick to one of the men's faces. Another jumped up next to her forcing her to her knees with a strike to the back.

Karai gasped, seeing Vine join Slash on the floor when a member slowly walked up and pulled his hood down.

"If you want them back." He tilted her head up with the tip of his sword. "You'll have to fight for it." He said before slamming the handle of his sword into the top of her head. Coughing in the background, Mondo reached for the TPhone next to him straining his body to reach it. He managed to pull the pin of the phone with his tongue before passing out with a groan.

Karai rose her head, her vision even more blurry than before. Her ears rang, and her lungs burned.

The man picked Kiba and Iris up as they cried, making Karai continue to tear up as he walked away.

"No! Don't!" She yelled, trying to get up before collapsing back to the ground. He smirked at her as more tears went down her face.

"No, no." Karai looked up as the gas began to clear, watching the people wander off.

"Please."

--

The family ran into their Ally's base with terror.

Lying on the floor was their friends seemingly lifeless as the kids were nowhere in sight. Mikey ran over to Leatherhead as he shifted in his unconsciousness.

"Leatherhead! Leatherhead! What happened?!" Mikey yelled, trying to shake his friend awake.

April, mona, and Casey rushed through the rubble, with Donnie and Angel trying to treat the wounded. Leo could only stare at the situation with horror as Raph began to growl. Donnie picked up the phone next to Mondo before turning to Leatherhead, who was rubbing his head.

"How did this happen?!" Raph yelled, charging at Leatherhead with Slash lying unconscious next to him.

Mikey glared at him as his friend began to shake.

"I-it was as if it was a nightmare. His breathing quickened as Mikey placed a hand on his shoulder. They had weaponry I had never experienced before. I-it managed to take me out instantly." He said his voice shaking, as he looked down and placed his hands over his eyes. "I'm so sorry, my friends."

"It's not your fault, buddy. Is there anything you can tell us about them?" Mikey asked, rubbing his back.

"I'm sorry, but I was gone before I even got a glimpse at it all."

"That's not good enough, Leatherhead. The kids are gone, and we need to know what happened to track these monsters down." Leo said standing next to Raph.

The alligator thought to himself, going through his memory. "When they showed up here, they claimed that they were humanists, But I don't know how they were able to find us."

Leo and Raph turned to each other.

Against the wall rested the injured and doctors of the group, trying to take care of them.

"You don't think they were tracking us through the Tphones right?" Angel asked as she hooked temporary oxygen tanks to Vine and Karai.

"I don't think so. I added every anti-virus and anti-tracking system imaginable, and if they were, they would of likely attacked us before." Donnie said, propping Mondo up against the wall.

"Well, then, how the heck did they find their way here, genius!" Raph yelled, pointing at him.

"Don't you think we're all wondering that?!" Donnie argued.

"Now is not the time, you two!" Leo yelled, getting between them.

"Yeah, we need to get all of them back before they do something to them," April said, walking over and gripping at herself.

Mona and Casey solemnly walked over, despair written on their faces. Angel slowly watched as the group began to truly see the situation at hand, her own set of tears forming.

Raph yelled, falling to his knees as Mikey held onto him, quivering. Leo sat beside Karai, still unconscious, as his face contorted with pain. April's hair began to shift with anger sobbing into Donnie's arms.

Angel turned to Vine, lying at her side as she wept.

"What has happened to us?"

--

In the Humanist lab was an array of horrific machinery and associates of the group.

"So now that we have them, what do we do with them?" The member with the tracker said, turning to the infants in a cage.

Irillia kicked and swatted at the metal containing her with the others cowering away.

The humanist young child was sitting on the lab table, looking at the mutants with curiosity.

"Blackmail, obviously, but while these freaks are here" He paused turning to them. "let's put them to use." Vital smiled at them maliciously.

The mutant family slowly huddled together overloaded with fear and tears, as the shadows of their kidnappers encompassed them.

--

At the base, Rockwell, Karai, Vine, and Slash were all being treated as Mondo and Leatherhead rested themselves against the wall.

Donnie and angel were dealing with the injuries as the others stood together for a group huddle, but no one really knew what to say. Everyone was still freaked out and trying to maintain their composure.

"So any plan on how to find them?" Casey asked, with Mikey trying to comfort mona and April next to him.

The group turned to Leo, whose face was paler than usual before he sighed, eyes clearly trying to hide his worry.

"Anyone pick up clues as to where they ran off. Footprints, a trail of some kind?" He asked, knowing there was likely nothing.

"There's nothing." Aprils breathing began to shift. "There is literally nothing!" April yelled as tears flowed down her cheeks.

The room went silent before Raph released a growl.

"If only they had left something behind! Something that could lead us to them!" He raged, kicking a chunk of concrete into a semi-collapsed tunnel.

Donnie took out the dart from Rockwell's shoulder.

"Agh!" A voice cried out.

Donnie looked at Rockwell, confused, given he was still unconscious. Donnie lifted his head before standing up and walking towards the semi-collapsed tunnel. He peeked inside through the opening of the wreckage.

"What you looking at, Donnie?" Mikey said as Raph took over in comforting Mona.

"I thought I heard something." Donnie scratched at the top of his head.

A groan seeped through the cracks gaining more of the group's attention. Mikey and Donnie urgently glanced at each other before tossing pieces of the tunnel over their shoulders.

"Do you think that's the kids or one of those "humanists"? Ralph scoffed, turning to Leo.

"I'm not sure. Let's check it out." Leo added, walking towards the tunnel that was almost opened up.

Mikey and Donnie stepped out of the way as Leo entered before following behind him.

They looked around the scenery with Donnie pulling out his Tphone. Mikey ran his hands along the side of the wall before stepping on something with a crack.

"Aghh!!" Someone yelled, jerking their hand away from under the turtle's foot.

They hissed, pushing themselves to their knees before locking their eyes on the mutants. The three turtles unsheathed their weapons as the intruder gaped at them.

"Stay away from me. You freaks of nature!" The man snapped, backing away from them and pulling out a knife.

Leo growled and kicked the knife out of his hand. Mikey and Donnie yanked him from the ground and pushed him against the wall.

The man continued to struggle against their grip as he twisted his face in fear. Leo held the tip of his sword to the soldier's neck, immediately halting his actions.

"It's time for some answers."

--

Alone in the humanist lab held, the eight children. All in separate cages stacked against the wall.

Kiba gripped at the bars that confined her to nothing but metal and the piece of cardboard she had for a bed. Tears went down her tiny face, now covered in cuts and bruises.

Underneath her, Irrilia, now with a split lip, foamed at the mouth as she teethed on the railings. She was growling like a feral animal her instincts taking a hold of her.

Next door to the snake, Iris was curled up in the corner of her prison. She had a black eye making it painful to cry but she couldn't stop.

Slowly a small shaky hand tapped at the bottom of the cage gate, making her shift to her hands and knees and begin to crawl over. She fell to her chest as her body went limp and looked down at the hand below her before leaning her arm out to hold it.

Dakota leaned into the cage, reaching his hand to hers as the water in his eyes trickled down his face. The bars pressing hard into his ribs.

Across the room and still on the lab desk, the little boy held a foam sword with a smile. He giggled, turning to the opposing wall where the caged mutants were held. The child watched in wonder before hopping onto the chair and floor. He waddled his way through the lab and over to Cody with his foam sword in hand.

Cody looked at him with fear pushing himself back. Reaching the cage the boy knocked at the metal making Cody back away even more.

He offered the foam sword with a smile, as Cody shifted head to the side. He was about to reach for it when the child was yanked up from the floor.

"Hunter, there is no need to associate with these freaks and traitors." Vital said holding him at his waist. "Their better off dead if they live their life a monster." Vital said before turning away. Hunter stared at the array of cages with fear as Cody cowered back into the corner.

"Chaplin, has the new batch of mutagen arrived yet?" He asked as Irrilia slammed her fists on the gate. Vital glared at her and kicked the metal bars before her, making her jump and quiver away.

"Yes, a large amount of mutagen was stashed at the mutant base." Chaplin said, pulling on some gloves.

"Good, then let's get to work."

--

The attacker fought and kicked at his captures before they shoved him to the floor. Casey and Mona holding him down as he continued to squirm.

"Where are they?" Donnie snarled, releasing the blade from his staff.

The man scoffed. "And why would I tell you pests? You're not getting me to talk!" He yelled, causing Mona to harshly grip his sprained wrist.

He cried, the pain surging through his body.

"Tell us now!" Leo held his blade at the man's throat.

He didn't budge, but Raph slammed his foot into the crevice of his ankle, making him scream.

Leatherhead watched with a smile towering over everyone as April's hands began to twitch.

Angel's expression shallowed, turning away from Vine.

The man's breathing began to vary as the sharp pressure on his neck began to sting.

"Tell us now, and we might just let you live." Mikey said, coming face to face with him.

Donnie and Leo quickly glanced at each other at the alien tone of their light-hearted brother.

The soldier spit in Mikey's face causing him to yelp and jump back in disgust.

Ralph growled. "Ok, that's it!" Raph grabbed the stubborn soldier by the neck and slammed him headfirst into the wall.

He clawed at the hot head of the group's hand, desperate for relief.

"If you don't tell us now! We will break every bone in your body before Leatherhead drags you to the bottom of the sewer tanks for a snack." Ralph yelled, tightening his grip.

Donnie pulled up a picture of the human anatomy as Leatherhead grinned. The man paled as his eyes watered.

"So what are you gonna pick?" April focused and raised her hand, causing his arm to twist.

"Aghh!" His face strained as he hissed. "There at the remains of the TCRI lab!" Raph let him drop to the concrete floor as Leo stepped toward him.

"Leatherhead. Drop him off by the police station. He has enough illegally obtained weapons to earn himself a decade or two in prison."

--

At the lab Chaplin reached into A cage a smirk growing on his face.

Kohanna screamed as she was taken from the group. Chaplin lowered a pair of chains from the ceiling as more cries radiated in the background. Kiba jerked at the cage, hissing and crying as Chaplin suspended the wailing redhead over the lab table.

Irrilia yelled, kicking and punching at the latch that her acidic teething had worn away. She slammed her fists into the metal bars and with a crack the cage door swung open, causing her to fall on the floor.

She pushed herself to her feet and looked up at Kiba, who was reaching out through the bars. Irrillia quickly began to crawl up the rails turning Chaplin's attention away from Kohanna.

Irillia groaned pulling on Kiba's gate before Chaplin gripped and yanked her by the arm, leaving her to dangle there as she squirmed.

Kiba growled as Irrilia wailed and grabbed her at her arm.

She hissed, spraying venom in Chaplin's face making him cry out and drop the salamander mutant on her back.

"Agh!"

Kiba released her arms, shifting them into snakes before gripping the sides of his face with their fangs. She pulled her arms back, slamming his face into the cage, effectively opening it and leaving him groaning on his knees.

Kiba climbed her way down, rushing to Irrilia, who was still lying on the floor. Kiba nudged at her cousin, still teary-eyed, before helping her sit up.

The lab door slammed open, making Kiba and Irrilia turn to the sudden light in the room.

Vital walked in, baton in hand, before a visible green spark was released on the end of it.

"This should be fun."

--

Back in the lair, Karai and Rockwell were back on life support as the others were getting patched up.

"So Humanist is essentially their term for anti-mutant?" April asked, with Mikey and Casey carrying Mondo and Vine on their backs.

"I guess, but why have they targeted us? After everything that has happened, there is bound to be a couple hundred mutants roaming New York." Casey said, dropping Mondo with a thud.

"Casey! Don't just go dropping Mondo!" Mikey said before accidentally dropping Vine.

The two on the floor groaned as the group just stared at Mikey.

"Oops, my bad." He laughed, tapping his fingers together, making mona roll her eyes.

Leo sighed. "Donnie, any ideas on how they tracked us?"

Donnie hooked his phone into the drive of his computer. "Well, based on the body scans and blood tests of Karai and Rockwell, the darts they were hit with appeared to have transplanted some form of tracker into their circulatory system."

"Wouldn't that kill them, though? Some random device flowing through their blood stream." Angel asked, sitting next to Rockwell.

"Yeah, and couldn't they use that right now to find the lair?!" Raph added, clenching his fist.

"I don't think so. It seems that these trackers are nearly microscopic and out of range. I can't even use them to locate the original Beacon." Donnie answered, tapping away at his keyboard.

"Well, then, how will we get them out? And how will we be able to fight against their technology specifically designed to kill mutants?" Leo asked, placing the orange-covered mutagen canister on the counter.

Donnie reached into a cabinet and pulled out dialysis tubing. "Well, as far as the trackers go, it's been a short enough time for them not to permanently reside in their kidneys. Meaning we can perform dialysis to remove them."

"Ok, why would half of us know what that means?" Raph said, crossing his arms, making Angel groan.

"For the gas, we can use those old breathers we used in dimension x." Donnie said, looking back to the group.

"Like savage Mikey!" He cheered before getting smacked by Raph.

Casey griped, pulling at his scalp. "Ok, well, if they're so against mutants, why are they taking mutagen?" Casey asked as Donnie took a swab sample of the orange slime. "Maybe it's how they study and create their weaponry. After all, things like retro mutagen and super mutagen all involve a similar study process." Angel said adjusting the wires of an EKG machine.

Mona sighed, walking up to the leader. "Let's discuss this later, but right now, we need to go." Mona said as Leo Looked at Karai.

"Mona's right. We need to hurry. The longer we take, the more at risk we're at." April added, standing up.

Everyone glanced at each other before turning to Leo. He straightened his stance and pulled out his katana.

"Let's get ready to fight, team. We've already dealt with so much in our lives. So what kind of family would we be to let them get away with this."

The room went silent as leo glared.

"This is a whole new form of evil."

--

Vital held Kohanna by the neck as the others cowered in the corner, faint, burnt, and bruised. Beakers and tubes filled with mutagen draining from the large tank in the center of the lab.

Mei and Ash were still weeping from their cage as Iris messed with the latch of her own. Given their age, Dakota and Cody had locks, but that definitely wasn't stopping them from trying, shaking, and tugging at the metal.

Kohanna continued to scream as she was strapped down to a table. She writhed against the restraints at her arms, with a mask now secured to her face.

She continued to cry but her movements were slowing down along with her breathing. Chaplin smirked as her wailing began to go quiet, and her eyes began to close. Kiba and Irillia latched onto each other and cried, watching their cousin, before being shoved into the wall. The redhead, now incapacitated, was left with nothing but the sound of steady breathing, a small heartbeat, and a continuous cry ringing in her ears.

--

Leo stood in the dojo, calming his nerves before their battle, looking at the picture frames on the shelf. There were three of them. One with him and his brothers as children in front of Splinter, one with the family right before Splinter's passing, and the one with their new family and no Splinter.

He tilted his head down, feeling a familiar presence in the room that he had not felt in years.

"My son, what troubles you so much."

Leo turned to his father, eyes wide. "Father?"

Leo didn't know what to say. It had been so long since he had last heard his father's voice.

"Yes, it has been quite a while, but I sense a strong tension. Tell me son, what is wrong?" Splinter asked as he walked forward.

"Father, I-I don't know what to say. Everything has fallen apart in a matter of days, with more of our family at risk." Leo said, shaking his head.

Splinter placed a hand on his son's shoulder. "You are the leader, Leonardo. You have the wisdom and control. You are capable of fixing this situation and capable of preventing it in the future."

Leo looked up at his father.

"Don't let anything erase that." Splinter said as he began to fade away.

"No, wait, please." Leo watched as his father disappeared. Leos eyes fell before turning back to the photos.

The image on the shelf of their current family imprinted in his mind as his eyes went white.

Donnie walked up to the entrance of the dojo. "Hey Leo, Shini and Mrs. Jones are here. Ready to head out?" He asked.

Leo turned around to his brother.

"We have a family to save."