The members of the Agency, isolated and unable to communicate with each other, are victims one after the other of assassination attempts, thwarted in extremis by a mysterious guardian angel. Who is this ?

As Fukuchi allies with plans to create an international anti-terrorist organization targeting Gifted, Atsushi and Rampo appeal to him for help. Rampo turns his immense detective abilities to the question of Kamui's identity, and the truth will change everything.

Atsushi and Akutagawa find themselves cornered, with no choice but to fight Fukuchi and his seemingly insurmountable powers. Combining forces and trusting in one another, do they have what it takes to defeat the mightiest Hunting Dog?

The last member of Decay of the Angel is revealed. Kamui continues to spread chaos. Tachihara entrusts Fukuchi with the information device containing evidence obtained at the Sky Casino, only to face devastating consequences.

The Detective Agency races to stop Fukuchi from receiving the One Order, a devastating mind control weapon that will make his plans for world domination unstoppable.

Fukuchi's plans and the Agency's attempts to thwart him escalate, and Aya comes face to face with Count Bram. Meanwhile, Nikolai and Sigma move to rescue Dazai and Fyodor from prison, but Nikolai has more than rescue on his mind...

As Atsushi races to find Teruko, Kenji arrives to help Aya and Bram escape the airport.

Kenji fights to help Atsushi, demonstrating why he is one of the most dangerous Agency members. Meanwhile, Dazai's machinations within the prison become clearer.

Fukuzawa and Fukuchi confront their shared past as time runs out for the Detective Agency.

Dazai and Sigma are trapped in a flooding room. Atsushi is attacked by Akutagawa when he attempts to help Aya. During their fight Aya desperately tries to remove the holy sword from Bram.

The final pieces of Fukuchi's plot snap into place, trapping Fukuzawa in a way not even Rampo could anticipate. At the same time, Fyodor and Dazai's deadly game draws to a close.