Kira was no ordinary girl. She grew up in a research facility known as Phoenix Corp., used for experiments, and most of all, she had psychic powers. One day, she heard that they were going to open up her head and study her brain. Of course, she couldn't let that happen, so she escaped. As she walked through the woods near the building she used to reside in, she found a mansion. This mansion was full of killers that didn't look like normal beings.

Eren Jaeger has just recently become a member of the survey corps. A small expedition left Eren with his supervisor, Levi Ackerman. Eren was told to clean but Levi has other plans. The old saying goes "Old habits, die hard..."