But Jane’s enemies are about to hit back hard. If their best operatives can’t outrun her, they mean to bring her running to them, using her five-year-old son as bait. Jane knows there’s no underestimating their capabilities, but she must battle her way back across the country to the remote shelter where her boy is safely hidden . . . for now. As she moves resolutely forward, new threats begin to emerge: a growing number of brain-altered victims driven hopelessly, violently insane. With the madness spreading like a virus, the war between Jane and her enemies will become a fight for all their lives—against the lethal terror unleashed from behind the forbidden door.