"Ephemeral Dream" is the eighth episode of the Durarara!! anime.
TarouTanaka begins by discussing how he always seems to lose important things, like a new umbrella instead of the old one. Kanra comments that "maybe we just think the stuff we lose is more important than the things we have."
Celty Sturluson wakes from a nightmare about her missing head and wonders when she last considered herself whole. Shinra Kishitani is looking forward to their day off, and he tells her that though scientists don't know where dreams come from, they are believed to come from memories. Mikado Ryuugamine oversleeps and arrives late to Raira Academy, forgetting his textbook, necktie, and wallet.
Erika Karisawa finds Simon Brezhnev in the park and asks him if he has seen Walker Yumasaki. A girl with a sign for lost things offers her notebook to Erika and tells her to write what she is looking for so that she may find it. A short while later, Walker comes to park looking for Erika. Simon has forgotten seeing her, but Walker notices the girl with the sign.
Kyouhei Kadota keeps an eye on Yagiri Pharmaceuticals, musing about rumors of its underground connections even though Kaztano is safe. As he walks away, a young man lights a firecracker and runs toward the building. An employee of Yagiri Pharma brings Shinra in to make the boy forget the company. Shinra warns him that he will remember the kid, and the man assures him they will let boy go.
Anri Sonohara notices her shoes are missing after school. She thanks Mikado for helping her look and leaves, but Mikado continues searching until he spots Anri's shoes on the lawn. In the park, he meets the girl carrying the sign for lost things. He asks to look through the notepad and sees Erika's message to Walker, along with another page where someone wrote 'head.' He writes his own message in the notebook.
Celty and Shizuo Heiwajima stand by an empty lot and try to remember what was there. Celty thinks about the life she is able to live even without her head, and she and Shinra go out to eat at Russia Sushi. They receive fortune cookies for dessert, and Celty's fortune reads, "You will find what you're looking for." Shinra states that he has never seen her so happy before.
Erika and Walker have found each other. Mikado returns Anri's shoes. In an apartment with the redheaded girl, Seiji Yagiri is content with her amnesia, as he is only looking toward the future. He tells her he loves her and calls her 'Celty.' As the headless Celty climbs into bed, she has a dream of when she was whole for the first time in many years. In the dream, her head resembles the face of the redheaded girl.
- To the kidnapping of Kaztano by Yagiri Pharmaceuticals
- Izaya's sisters Mairu and Kururi are the twins wearing coordinating outfits who walk by Simon and Walker in the park
- Walker and Erika meet at Toranoana, a famous shop in Akihabara that sells doujin, manga, and other manga and anime-related items.
- The light novel covers on the outside of Toranoana are the first volumes of Baccano!, Vamp!, Etsusa Bridge, and Harimiya-san: Center of the World, all other works by Ryohgo Narita.
Kanra: "Maybe we just think the stuff we lost is more important than the stuff we have."
Shinra: "Memories are a tricky thing to get rid of. And plus, I'll remember this kid."