On a distant and nameless planet lived forgotten and seemingly forgotten robotic toys that called themselves Lumi. Their favorite activity was to sit on the beach and admire the sunset.

One day they heard a roar from the sky and a terrible alien warship landed on their beautiful planet. It turned out that the ship of the hero of the war, named Sphery, who fought with the Kuboids in the constellation of Triangle was hit, and he made an emergency landing.