Dr. Akihiro Kanou experimented on you and you turned into a one-eyed ghoul. You are not the only one who has been tested. Something went wrong during the experiment, and all the ghouls, including you, went on a rampage.

You have no memory of what happened, but you managed to escape. But then you became hungry. You lost control of your hunger and killed and ate a person. However, the CCG appeared out of nowhere, pointing their quinque at you.

You're now being hunted.