Johnny, they got a sun-poisoning super weapon.
So it is up to the intrepid bloke to try and save the League of Cluster worlds from their own apathy and those that wouldn't hesitate to sabotage their friendly neighbourhood stars.
This entails a lot of spaceship travel, along with biffo on blades on various primitive worlds and he tries to track down the chief malefactor. Without much help, either, as a lot of people just don't believe this story.
3 out of 5