Tension in Ikebukuro is at an all-time high with Toramaru in town seeking revenge on the Dollars, but that isn't the only problem... With the Dollars' members acting out, Shizuo on the run, and...

"That's why I'm Here." To face the past and protect the present, Masaomi Kida, leader of the Yellow Scarves, heads to Izaya's apartment. His intention is to discover the true identity of the leader of the Dollars, but what he finds shocks him to his core! When the Yellow Scarves, the Dollars, and the followers of Saika all gather in one place, three best friends must confront the greatest challenge to their friendship...

"I'm not doing anything. All the Dollars did that together..." The holiday isn't over yet. The day after Izaya was stabbed, the scars of the recent incident are still fresh in the city. An eccentric couple wanders the town together as a sister keeps an eye on the girl hanging around her brother. Two women--one a child, one an adult--pursue the meaning of strength, focusing their attention on the strongest man in town. A set of mischievous twins don't bother to care about their brother. A yakuza clings to his past. Meanwhile, an underground doctor just wants to enjoy a vacation with a recently relaxed headless dullahan... Ikebukuro is going to be busy!

New York, 1927. In a corrupt city where crime rules the streets, Firo Prochainezo is in the Camorra, an Italian criminal syndicate distinct from the mafia. Though a member of the relatively small Martillo family, Firo has big ambitions and is determined to make his mark. But while the Martillos may not be the biggest bad guys on the block, they've got some distinct advantages working in their favor. Does Firo have what it takes to become a made man? Let the crazy ruckus begin!

Megahit idol Ruri Hijiribe is suffering at the hands of a stalker, and his obsession with her is growing by the day. In order to see how she reacts, he becomes more strident in attacking and hurting those around her. One of the innocent (?) victims is the doctor and love of Celty the Headless Rider, Shinra Kishitani. As she clutches his wounded body, Celty loses her head with rage! (Literally.) And you just know who else is gonna show up behind the scenes...It’s Ikebukuro, after all!

Kadota is in critical condition, and according to rumors and speculation, the fault lies with the Yellow Scarves. Meanwhile, with Shizuo Heiwajima out of Dollars, Celty is asked to become the next symbol of the group. Though she declines, Celty is flabbergasted to discover what Mikado has planned for both himself and Dollars. Both he and Kida are determined to restore their friendship—but just how far are they willing to go?

As a founding member of the Dollars color gang, Mikado Ryuugamine methodically purges those unharmonious from its ranks. Kida attempts to rein in his friend's madness and begs Kadota's group of core Dollars members to leave, but they refuse. However, when calamity befalls Kadota, the spark of a new disaster catches flame...Meanwhile, in the hospital, Shinra tells Celty of his middle school days with Izaya Orihara...!