At night, in the alley street, you got attack by two wolf gangsters, held a knife, and a gun, wanting you a money, and they could hurt you if you don't pay them.

But... All sudden, one of gang got shot by a unknown assassin in rooftop. You don't know him, but the gangsters do, as they got scared, and run away.

you saw, he stares the gangsters when they running, before he suddenly glances down at you, with that white eye pupil glowing in the night.