C169 Zero

There was a bronze ring on the middle finger of the corpse. It also said 13, and it gave me the feeling that 13 was not a normal number here, such as the little girl on the floor, the badge and ring of the corpse had something to do with 13, and I was in District 13, too. Did they have something to do with here?

I put away the photo and waited for a chance to ask Master Loong about it