This story was about a group of revolutionaries who are political prisoners, sent back to the first epoch, where they won't trouble anyone. The story was told as flashback chapters, and dealing with the present (or rather, past). It would have helped me to understand a lot of the dialogue if I was familiar with various government/political and economical theories, as there was a fair bit of discourse between characters on these subjects (being revolutionaries and all). An interesting premise, well told, though it does require the previous mentioned knowledge to be completely understood (and enjoyed?).