Hey there! There are a few things that you should know about this story:

1. This is my first fan fic, so if you are going to criticize, do it constructively. Nobody looked this over, so there may be some errors.

2. Chapters may be long or short, depending on where I think a good stopping point might be.

3. It's rated M because there will be mature scenes in later chapters.

4. I don't TMNT. I own Hunter, so you can't use her.

5. Finally, I want you to enjoy!

Chapter 1

The scientist was working late with a container filled with a mysterious substance. It could mutate a living creature with a single touch. A small organism was crawling near her on the floor. She carried the open container to another counter. The little one bumped her leg, causing her to accidentally shake the container. A glob of the substance fell on the organism. It started to glow, then its body began to mutate. The scientist stepped back in horror as the creature cried in pain. Then it all stopped. The mutant looked up at the scientist with eyes filled with a mix of sadness and fear. She looked down at it and knew she had two choices. She could either take care of it or destroy it. She would never kill this creature or even think of hurting it. So she continued to raise the mutant and gave it lots of love. It had been a year and a half since the unfortunate accident when she found the cure. Well, not the permanent cure. According to the calculations, it would last 24 hours. She knew that she could make enough to last many years. She carefully filled a syringe with the dark purple liquid. She looked into the mutant's eyes and smiled. When it smiled back, she carefully injected the serum into its arm. The creature whined for a moment, then suddenly, it started to go back to normal. Its green skin turn back to a pale peach color. Its light purple eyes changed back to light brown. Soon it looked like it did before the mutating substance touched her. The scientist smiled at the little girl who looked at her with happiness. Every night at nine from then on, the scientist filled a test tube with the serum and let the girl drink it. When she was finally old enough, the scientist trusted the girl to take it by herself every night. Now the girl was 15. She was on a mission to locate the not-so mysterious substance mutagen. Containers were somehow scattered amongst the city. She had a high tech tracking device that was very accurate. She was lead down an alleyway until she reached the end, when she saw the container filled with the almost glowing blue-green liquid. She picked it up and scanned it so the tracker knew not to look for that one again. She happily put it in her purse. She was unaware of the pairs of eyes looking at her from the rooftop. She looked at her phone and saw that it was getting late. 8:45 to be exact. She search her purse for the serum. When she couldn't find it, she assumed that she left it at home. She wasn't planning to stay out that long, yet she was far away from her apartment. The subway might work, but she wouldn't risk changing in front of all the people. She had a skateboard, but even with it, it would take at least 25 minutes. She looked around, desperately trying to think of a way to return home in time. The eyes above her watched as she panicked. They didn't know why, so they kept watching her silently to hopefully find out. She looked down and saw a man hole cover. She sighed, and decided that if she did change, no one would see her. She carefully descended into the sewer and went in the direction of her home. The eyes on the rooftop were attached to four mutant creatures. They looked at each other in concern. Their home was down there. What if she found it. The tallest one spoke up. "Why did she have a container of mutagen?" he asked. "Why did she go in the sewer? I thought that humans thinks the sewer's gross," The shortest one asked. "I don't know," the first born said to both of them. "We should leave her alone. She could be dangerous to us. Let's just- where's Raphael?" The green eyed one had sneaked away to follow the girl. He was stealthily watched her as she tried to navigate through the maze of sewer tunnels. She did not know he was behind her, although she knew of the mutants. She spotted them months ago jumping across rooftops. After that she watched them from a distance, writing as much as she could about the four. She observed their behaviors, learning how they interact with each other. She noticed that the one in the blue seemed to be the leader and the one in red had to be second, because of the constant arguing. She also noticed red-masked one had some anger issues. She looked in her purse another time, then sighed in relief when she saw a test tube with a royal purple color liquid at the bottom. She quickly took it out and drank it. After putting the empty test tube back, she decided to keep going. The mutant creature wondered what was the substance she just drank. He continued to follow her in silence. She eventually found her self at what she thought was abandoned train tracks. She kept walking along the tracks when she heard a rumbling sound she stopped and listened to it. As it got louder, she turned around and saw a faint light. The tracks were not abandoned. She wanted to move but she was frozen in fear. The mutant looked at her wondering why she wasn't getting off the tracks. He saw that she still wasn't moving. The train was getting closer and closer. He figured that she wasn't moving because of fear, so right before the train could hit her, he ran up and pushed her off the tracks. She held still as the mutant pushed against her, trying to make sure she was safe. He was pressing her so much into the wall that she was having trouble breathing. The train was scraping his shell, so he tried to push against her more. When the train finally passed, he backed up. She took a deep breath, trying to take in more air. She looked at the mutant in front of her. It was one of the mutants that she had been watching. She was struggling for words since she was still trying to get over the initial shocks of almost being killed by a train and being this close to the creature. "Thank you... for saving me... from... the train," she said shakily. He gave her a half smile, not wanting to startle her more by talking. She started to walk away when he suddenly pinned her to the wall by holding her shoulders. "Uhh..." She didn't know why the mutant was keeping her there. He looked straight into her eyes, seeing a look of fear mixed with curiosity. He looked her over wanting to get a better look at her. She was wearing light colored skinny jeans, black sneakers, and a purple long sleeved shirt over a white cami. He carefully moved one of his hands to her collarbone so she wouldn't be able to get away. Then he took his other hand and ran it through her long, dirty blond hair. It was silky with no tangles. She felt him touching her hair, wondering what he wanted. She stayed perfectly still and silent, breathing slowly. She looked up at him and thought to herself, 'What is he doing? Why is he doing it?' He met her gaze with friendly eyes. Then he took his hands off her, backed up, and bolted. She watched his run off, not knowing if she would be this close to him again. She looked down and noticed that he dropped a weapon. Looking closer , she saw that it was a sai. She picked it up and then walked off in the other direction, climbed up to the surface, and walked through the night to go home