Despite the recent Akuma attack, the Black Order members are in high spirits as they prepare to move to a new base. However, immediately upon his arrival, Allen Walker is suddenly summoned by the Central Agency, and his arm is forcefully sealed by the Order. He is then taken to a surprising meeting with his master, General Cross Marian, who reveals staggering secrets regarding the enigmatic 14th Noah. A phantom thief incident, the arrival of a mysterious group of Exorcists, the death of an important comrade, and an all-out battle against the Noah Family—what does this mean for Allen, Yuu Kanda, and the rest of the Order? This is only the beginning of a series of strange, seemingly unconnected events that lead to something far greater.