Cassy and her Clan have made it alive to the promised oasis of her farm and prepare for the upcoming winter. But old enemies race to catch up to them and have a different plan in mind for the Clan. Meanwhile, resistance cells in New York face long odds, including betrayal from within and a tightening gauntlet from the invaders and their quislings. The 20s hint at a plot to level the playing field against the invaders, but their end-game is unclear. Will Ethan-the hacker known as Dark Ryder-uncover the truth in time, and if so will it make a difference? For the Clan, the Resistance, and Dark Ryder alike, a deadly trap awaits...