Spheres From Other Worlds

Four robot explorers travelled to investigate a civilization powered by a Dyson Sphere. But when they arrived, they found that the native society had collapsed. All contact with Earth had stopped. These robots were programmed to think and act just like us. What will they find when the reach the planet? What destroyed the alien civilization? How will the robots adapt now that their mission parameters no longer make sense? These droids will find that they must struggle to survive. They will also have to struggle to redefine themselves in this new world.