Mae never asked for the abilities that almost cost her her life. Now she must call upon them on a daily basis, leading dangerous missions to bring down a corrupt government and breaking into the minds of her enemies. Other kids in the Children's League call Mae 'Leader', but she knows what she really is: a monster. When Mae is entrusted with an explosive secret, she must embark on her most dangerous mission yet: leaving the Children's League behind. Crucial information about the disease that killed most of America's children - and turned Mae and the others who lived into feared and hated outcasts - has survived every attempt to destroy it. But the truth is only saved in one place: a flash drive in the hands of Liam Stewart, the boy Mae once believed was her future - and who now wouldn't recognize her.