The mother planet, Earth, ruined and abandoned, is now a distant and unimportant memory. There is galactic war between galactic factions (presumably humanoid although who knows for sure). A new power source is being used to operate space ships and even to control planets … it is the Mind.
Wait, wasn’t that a Star Trek episode from the 1960s?
How about the once important person escaping from pursuers who creates friction with the local power structure but in the end is instrumental in saving the planet’s Mind from forever wandering and saving the locals from sure destruction.
Do the two antagonists kiss and make up or do they both recognize the value each brings to the galaxy and go their separate ways into an unspecified future?