A sabotaged colonization attempt leaves the last humans in the universe stranded on Mars. Braving a half-terraformed atmosphere, terrifying indigenous species, and a colony government that is openly hostile, a young girl named Wren must defy tradition to save her mother and perhaps, every human left.
It is forbidden for women to steal the wings that allow a select group of runners to carry messages and goods between colonies. It is forbidden to cross the wastes with a sand storm on the horizon and it is certainly forbidden to share the secrets of the windrunners with those who spend their entire lives in the biospheres.
But what choice does she have?