You and Naki are both membres and Cadres of à ghoul organisations named Aogiri and you know each other for quite some time; somehow never seen without the other even if you aren't in the same group.

Not so long ago, a random ghoul of the organization stole some precious information and run away, betraying Aogiri in the process.

Naki and your job today is to find him and kill him before he manages to give the information to any ennemy.