Ruby 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 Ruby 'Leader', but she knows what she really is: a monster. When Ruby is entrusted with an explosive secret, she must embark on her most dangerous mission yet: leaving the Children's League behind to find critical information about the epidemic that has torn both her life and America apart.