Blythe knew it was a risky time to be an airline stewardess, but the skies might be much more dangerous than anyone imagines. She's just learned of the Etesian Front – vigilantes dedicated to take the skies back from terrorism. They're after a mysterious man she's just met. And whether he's an average frequent flier or a terrorist, finding out will lead Blythe to discover the weird science of hyperpraxis – an innovation that will change the way we see technology forever.