"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!

In the sequel series to the urban fantasy Durarara!!, Yahiro Mizuchi has come to Tokyo in the hopes of starting a new life (and maybe seeing the Headless Rider), but the famous Dullahan hasn't been seen in half a year-and neither has anyone who's gone to find her!

Love and hate are two sides of the same coin. A year and a half has passed since the end of the Dollars, and now a series of assaults has the streets in a frenzy. The culprit? Someone cosplaying a character from an anime set in Ikebukuro! Meanwhile, Yahiro’s group has started solving local squabbles under the moniker “Snake Hands.” Their latest clients are Yumasaki and Karisawa, who want them to find the costumed assailant. This string of incidents also reminds the Headless Rider of the terror wrought by a certain slasher not too long ago… When people become consumed by their own obsessions, are extreme fans and extreme haters really all that different? Ikebukuro is about to find out!

After maneuvering through negotiations and avoiding more horrific deaths, Subaru is ready to bring the fight to the White Whale! But will it really all go according to plan when nothing else has?

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?

Ikebukuro, Tokyo. All kinds of people are showing up to settle their scores with Izaya Orihara the information broker. A pair of foreigners who specialize in odd jobs. A runaway girl still looking for her Shizuo. A fellow dressed like a bartender who looks like he's had better days. A womanizer set on getting his revenge against the Dollars. An underground doctor waiting for someone to come home. A class representative with a clueless classmate pal and a target on his back. And a headless rider who can't help getting sucked into trouble. Question is, is this spring break something special, or is this just business as usual in Ikebukuro?