Hmmm, it would probably be about a small object, maybe a ball or orb, an object with sentientience to hear, see, move but not talk/communicate with other beings(at best it only speaks in its own mind). This ball/orb is alone, somewhere in a dark, abandoned town/city or even the ruins of one, with the means of combating the darkness through the power of light: perhaps the ball/orb just so happens to carry in it some component which let’s off a neon glow of sorts, allowing this object to move about in order to see better of what could be in front of it or even to ward off… Some unsettling forces hiding in the darkness itself…