Athena was taken to TCRI where the Kraang have been doing experiments on other things and this was their first test subject on a human child. The Kraang placed Athena in a cell and locked her up until the experiment on her will be next until everything is set up.

Leo 

My brothers and I were on patrol again and this time we've got ourselves dealing with the Kraang at TCRI. 

"What's the plan fearless leader?" Raph asked.

"We go inside and see what the Kraang are planning and end it before they can even finish it." 

"And then we bash some bots." Raph cracks his knuckles as I grinned.

"Technically speaking I can see that sneaking in is going to be a lot difficult for us. The Kraang seemed to have updated their gadgets, camera high wire, and staff guards as well." Donnie said.

"Whoop! Kraang must've been doing some new improvements to force us not to go in there." Mikey grinned.

"There's gotta be a way inside. Donnie can you access the software and hack our way in there?" 

"I could try." Donnie said.

"Good. The three of us will take out the guards and enter our way inside and we'll wait for you." I said as we hopped off the roof tops leaving Donnie to sneak around and saw the new bodyguards the Kraang had updated. 

I shushed the other's we attack mostly 5 of them since they seemed to be guarding something important. Donnie manage to hack through the security software system and met up with us.

"Seems like two of the bodyguards were guarding something important." I said as we made sure no Kraang inside was around as we jumped inside to have a look around the place.

"I don't know it's really quiet like when we first arrived here. Remember?" Mikey shrugged.

"Yeah. Back when you pressed that button." Raph said as Mikey  grumbled.

"Quite! Look over there." I shushed them as we saw the Kraang setting up a chair with doctor utensils to go along with it. They must be experimenting on someone like they did to almost any animal and now a human?

"Must be another experiment their doing. Only this time a human." Donnie whispered.

We heard the doors open our heads heard whimpering coming from a little girl struggling to get out the Kraang's grip. 

"Our experiment is now set up. Let us begin." Kraang said. 

"No! Let me go!" She cried out as she was placed in the chair being strapped down.

"All right team, let's bash some bots." I said taking out my katana's from behind my shell as we jumped down to save the little girl.

Athena

I was trying to get out of this strapped chair, but it was no use because of how tight it was. The Kraang was holding a needle with the green stuff inside he was about to place that stuff inside of me but something hit him in the head that shaped like a star. 

"It is the one known as the turtles." Kraang said.

"Get ready to bash on Kraang." One turtle said wearing a red mask.

The turtles were fighting the these so called, 'Kraang' bots as I tried to break out of this strapped chair. I tried to wiggle myself out of there as I saw a turtle running to where I was helping me get free he had on a purple mask.

"Thank you." I said with a smile.

"No pro-" He was cut off by the Kraang as I steadily got off the chair and landed on the ground hearing a crashing sound on my feet. I look down to see that green stuff from before when that Kraang was about to put in me and I gagged.

"Yuck!" I exclaimed as I noticed my bag right beside me and Miss Rabbit too.

"Let's get moving!" I heard the blue mask turtle yelled as he rushed over to me up and carried me out of there followed by the other three.