Driven out from his orphanage, Nakajima Atsushi wanders the streets of Yokohama on the bring of starvation. Determined to live, a chance encounter with a drowning stranger changes his fate...

Dazai goes missing, but the Agency operatives feel it's just business as usual. Meanwhile, Atsushi accompanies Yosano Akiko on a shopping expedition, where they are suddenly plunged into the middle of a terrorist bomb threat by one of the Port Mafia...

The Port Mafia's council of five top executives has decreed that Mimic must be annihilated. In the ensuing battle, Odasaku has a fateful encounter with Gide, the leader of Mimic, who makes a cryptic prophecy. Night falls, and the usual bar now awaits Dazai, Odasaku and Ango...

Mori, the leader of the Port Mafia, sends a letter to Margaret M. and Nathaniel H., threatening to destroy them and the ship they are protecting.

The leaders of the Agency and the Port Mafia negotiate an alliance. Meanwhile, Dazai and Chuuya face off against Lovecraft.

Atsushi and Akutagawa fail to call off the Moby Dick's descent. They search desperately for other ways to protect Yokohama.

Nakahara Chuuya and Dazai Osamu reveal the truth behind Arahabaki, Randou, the former Port Mafia boss and Chuuya himself.

The Agency is tasked with finding and delivering an important document. A man is hit and killed by a truck. His identity shocks Atsushi.

The leaders of the Port Mafia and the Detective Agency are attacked by an assassin in a mask, leaving both of them ill.

The Detective Agency president is in safe hands for now, but unless he or the Port Mafia boss dies, a full-scale war between the two organizations is inevitable.

The gifted responsible for the virus is on the run as Nakagawa Atsushi and Akutagawa Ryunosuke chase after him. Meanwhile, the Detective Agency has the Rats’ hideout surrounded to try to capture Fyodor Dostoevsky.

Rampo gets a ride to the police station, but the officer doesn’t seem to be who he says he is.

The last page of the manuscript received by Poe appears to have been a photocopy. Rampo seems to know why, but there are still more mysteries surrounding the death of the author.