I’m a zombie.

A man in a suit runs down a blood-stained staircase toward the camera, screaming, as several figures in white shirts stand motionless on a rooftop with industrial structures and bloodstains under a bright sky. The scene shifts to show a man holding a woman's head as she lies on the ground, then to a group of figures standing still on the rooftop, with one figure in the foreground walking slowly forward.