They followed the beam's angle and spotted a drone hovering silently above the next building. Marcus waved his arms, and the drone slowly dropped onto the roof. A speaker on it crackled to life: "Nice work finding me. I'm a contest. First to spot me wins a real telescope." Priya and Marcus high-fived. They'd won.

Before they could move, the blue dot blinked twice and shut off for good. The night went back to normal, plain stars in their plain spots. Marcus checked his camera, but the photos came out blank. "No one will ever believe us," he said quietly. Priya nodded. Some mysteries just slip away and leave you with nothing but questions.