New York looms, the task finally at hand. Betrayal after betrayal, loss after loss have taken their toll on Trio, but she's made it at last. And yet, nothing could prepare her and her sister Duet for what and who comes next-for the darkest deception of all. The sister clones must accept the ultimate sacrifice, risking everything and everyone they love for a dying humanity before the very person they've sought can remake the world in her image.