Titan
The scout drone entered Titan orbit, Saturn and its rings in the distance. Debris was scattered around the moon, and derelict ships barely hung in orbit, threatening to either escape Titan or fall into the thick atmosphere.
The drone began scanning the area, finding no detectable life signs or worthwhile energy signals. After investigating a couple of the derelict ships, it turned its attention to the ground.
That was when it detected life.
It was weak, perhaps dimmed by the atmosphere or unconsciousness, but it was there. There were also energy sources, all centred on a large structure on the surface of Titan.
The drone, perhaps by its programming or conscious decision by the artificial intelligence controlling it, sent a directed, high-energy message through the atmosphere to the structure below. Then it waited for some sort of response...
"Detected life signs and energy signals at the present location. Please confirm."