The year is 2068. The place, Fontainebleau forest, ancient home of some of France''s mightiest monarchs on the outskirts of what was once Paris. The post-apocalyptic society of Pan survives by growing rice and scavenging among the ruins of a destroyed civilization. Their precarious existence comes under threat when the powerful, technologically advanced Federation of Fortuna forces them into a dangerous choice—submit to Fortuna''s rule, or try to best them in a barbaric, ritualized game known as Celestial Mechanics. Pan''s only hope? A hot-headed outcast they''d rejected for being un-Pan: a girl named Aster.