A small Capellan force invades the home of the heroes, cutting it off…or Midville. e.g. avoid the USA, zombies and alien invasions, no problem.
Wolf-reptile centauroids no less. So try and put a stop to this, hope a gravity random encounter doesn’t get you sucked into a black hole and take the fight to the Capellan system. Which is the interesting part, with several alien races, subjugated and otherwise.