At the end of Book 4, Hoodwink returned to the Outside and departed in a small vessel, apparently abandoning Tanner and the rest of humanity to their fate.
Now Tanner must fight alone against the threat raged by One, the rampant, seemingly invincible AI.
Will Tanner find a way to defeat the AI before the world of the Inside is completely destroyed?
Meanwhile, will Hoodwink save the daughter he gave up everything for and, more importantly, will he betray humanity to do it?