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!

"Could you kill someone? Working as an information broker in Shinjuku, just toying with all those people... But could you, Izaya Orihara, kill someone? Directly, by your own hand? Not stabbing someone with your knife just right to keep them from dying while you keep dodging the question, I mean. Well, whatever... In the end, you're the kind of guy who uses other people to do your dirty work. You're hilariously cowardly." Tokyo, Ikebukuro. Loads of baggage from the past are starting to turn up: A boss trying to escape the past. A pair of high school girls with consciences. A boy unaware of his friend's feelings for him. A man planning a takeover. A boy who uses information to manipulate others. And a headless rider on a pitch-black motorcycle--all headed on a collision course that will decide who will overcome their past and who will become nothing more than a memory...

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...!

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?

"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!

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!

It’s ok to be a monster. ​Although the Dollars are long gone, the city is far from quiet. In Ikebukuro, anyone who expresses an interest in the Headless Rider mysteriously vanishes. At Raira Academy, Yahiro Mizuchi and Kuon Kotonami have begun tracking some of these disappearances for their classmate Himeka Tatsugami, whose sisters are among the missing. But nothing could prepare them for who they encounter during their search—none other than Celty Sturluson, the Headless Rider herself!