A gunshot resounds from an alley, echoed by a phone call for Masaomi. Mikado rides with Celty, and Anri learns the truth. Their hearts are filled with trust, doubt, and unease. Everything rushes toward a conclusion, and Izaya enjoys the chaos.

As Anri faces off against Haruna, truths about her past are revealed. Elsewhere, Shizuo fights an unending battle against the Slashers in South Ikebukuro Park. As he defeats them one after another, his expression starts to take on a hint of joy.

Filled with unwavering determination, Masaomi enters the abandoned factory, and encounters the unexpected. At last: Masaomi, Mikado, and Anri face off. Although each of them carries inexpressible feelings, they eventually find an answer...

Anri's missing friend, the Dullahan, the girl with the scar on her neck, Yagiri Pharmaceuticals, the kidnappings, and the Dollars... little by little, the pieces begin to fall into place.

The Dollars are enraged at the Yellow Scarves’ actions. The Yellow Scarves learn that Anri is the girl who escaped from their hideout during the night of the meeting, and track her down. However, an unexpected group of people steps in to save her...

Anri is targeted by the Slasher, but Kyohei’s gang moves to rescue her. Shizuo and Celty join in, and after defeating the Slasher, reveal his true identity. However, this moment of relief doesn’t last as Celty reads what has been posted in the chatroom.

Civil unrest begins to descend upon Ikebukuro. Masaomi finds himself in an abandoned building, depressed, thinking about his past: how he ended up back there, and how a girl still waits for him at a hospital.

Anri notices something is wrong with Masaomi, and takes action to find out what it is. Elsewhere, a gang-war breaks out between the Yellow Scarves and the Dollars over the Slasher’s identity. The standoff grows as Mikado’s desire to stop it is ignored.

After doing some investigating, Masaomi starts to suspect that the remnants of the Blue Squares, a gang that he once fought, have slipped into the Dollars. He decides to visit Kyohei’s gang to learn the truth.

Magazine Journalist Shuji Niekawa’s unbridled passion is raging. A Russian who runs a sushi shop, the Awakusu organization, an Information Broker, the Headless Rider... He investigates the supposedly strongest man in Ikebukuro: Shizuo Heiwajima.

Mikado runs away with Mika and shelters her into his apartment. However, in the following day, he is approached by Celty and Izaya, and after telling her secret to him, Celty convinces Mikado to help her find Mika. Unfortunately, Mikado is cornered by some Yagiri Pharmacy workers who question him on Mika's whereabouts. In order to save Mika, Mikado reveals to Izaya and Celty his secret.

Despite Mikado’s orders, the Yellow Scarves hunt down members of the Dollars. Mikado begins to question whether the existence of the Dollars is worth such a sacrifice. Anri tries to put a stop to the gang war, but ends up making the situation worse...

Anri is attacked by the Slasher. The same night, the user Saika appears in the chatroom, and posts a puzzling message. Mikado, worried about rumors that the Slashers are the Dollars, decides to cooperate with Celty.

People throughout the city speak of an urban legend known as the “Headless Rider”. A surprising number of people have personally witnessed it speeding down the streets on a jet-black motorbike with no license plate.

Half a year has passed since the Dollars meeting and Ikebukuro seems to have returned to normal. But underground, the Yellow Scarves and the Slasher are becoming increasingly active. Darkness approaches, ready to destroy the days of peace.

Shizuo Heiwajima, also known as “the strongest man in Ikebukuro”, is a man who definitely relishes that title. Though he carries with him a high esteem, something is amiss. Lately he has been extremely short-tempered and does not know why.

After losing contact with her brother Seiji, Namie Yagiri enlists Izaya's help to find him. While roaming through Ikebukuro, Seiji and Mika Harima stumble onto Shizuo and Celty and a heated pursuit begins after Celty figures that the head attached to Mika's body is actually hers.

It is discovered that Harima Mika is actually alive, and that Celty's head is being held by Yagiri Pharmacy. Shinra had known about it, and kept the secret from Celty for the fear of losing her because of her head's will.

The Awakusu Group executive Mizuki Akabayashi, nicknamed the “Red Devil of Awakusu,” hates drugs and keeps a vigilant eye on the trends in the city of Ikebukuro. The reason why he hates drugs goes back six years to the night of a fateful encounter.

A sudden attack strikes Celty. Shinra waits at home for her return, unaware of what’s happened, and is visited by Shizuo, who brings along the mysterious young girl. Mikado hears of a bad rumor about the Dollars and starts trying to figure out the truth.

Kadota was in a hit-and-run and the resulting rumors have Saburo and Walker taking action. In an effort to get information on the Dollars, Shuji Niekawa contacts Haruya Shiki. Meanwhile, Akabayashi follows up with Izaya on his investigation of Mikado.

Amphisbaena runs an underground casino, and Heaven’s Slave, a gang of drug dealers. Even then, no one can figure out who these two groups really are. The Awakusu Group hires Izaya to do some digging, but...

Half a year has passed. The city of Ikebukuro seemingly remains unchanged, but foreign elements are slipping in, the serial killer known as “Hollywood” being one of them. The fuse to a new series of events begins to smolder!

It’s summer, and Anri has begun to worry about Mikado. The popular idol Ruri has been plagued by a malicious stalker. It seems that stalker is in the Dollars. In an attempt to obtain information, Yuhei and Ruri visit Shizuo...

Anri opens up to Kadota and the others about Saika; meanwhile, Erika discovers that the Saika zombies are after Mikado and Kasane.

Kasane’s unexpected visit to Shinra and Celty sparks a chase across the city. Meanwhile, Masaomi and Chikage’s fight has been interrupted by Izumii, who’s looking to settle matters with Masomi.

While transporting some mysterious luggage, Celty attempts to escape the biker gangs out to claim the 10 million bounty that’s been placed on her. Caught up in the chaos, Mairu and Kururi join with Kyohei and the others.

Anri seeks out Erika at the hospital, but they have a few unexpected encounters before they can talk. Meanwhile, other women throughout the city begin to take action.

Izaya is overjoyed at Mikado’s behavior, which has greatly exceeded his expectations, and grows more excited at the future uproar he is ushering in. Masaomi and Chikage talk through things, while Saki and Anri break the ice.

With the uproar over the bounty settled, the city appears to be peaceful. However, the sparks of a new uproar begin to light, one after another. The womanizing leader of the Toramaru gang visits Shizuo, and Celty receives a request from the Awakusu…

Aoba continues to urge Mikado to become the leader of the Blue Squares. Varona and Sloan, meanwhile, maintain their pursuit of Celty as the Awakusu group searches for both Akane and Shizuo.

The number of Saika possessed people continues to increase as they fill the area around Russia Sushi. Anri heads to visit Celty and the Blue Square prepare to confront Chikage, all while Izaya and Shizuo fight to the death.

In the city of Ikebukuro, something else is beginning to move. Everyone that has gathered in Celty’s apartment discuss how to deal with the problems they’re each facing.

Masaomi contemplates friendship as he travels far from Ikebukuro. Mikado receives an unexpected visit from Aoba. Akane explains the real intention behind her attempt to kill Shizuo. And as Toramaru retaliates against the Dollars, Chikage confronts…

With news of Izaya's hospitalization quickly spreading, the information broker is filled with anticipation and excitement about which of his many enemies will make a move on his life.

Namie is keeping a close eye on Seiji as he and Mika go on a date.