With their ranks now wilting, and no end to the onslaught in sight, the Intercalary scramble to solve the riddle of who is behind the attacks in a desperate hope to stop any further losses. Meanwhile, as members abroad have begun to return home, many more still wander - unaware of the danger they are about to encounter. Can Ember and the rest protect the members currently being hunted? Or will they find their missing ranks too late to help? This is the third installment in a 12-part serial thriller.