Berlatar cerita di wilayah Kojima, Prefektur Okayama, Jepang pada tahun 2020. Tepatnya dua hari setelah Olimpiade Tokyo yang telah dijadwalkan. Kokone tinggal bersama ayahnya yang selalu bekerja di bengkel otomotif. Ketika ia mulai menyelidiki mimpi aneh yang selalu dilihatnya, Kokone mulai mengungkap rahasia tentang keluarganya.

Alternative Titles
English: Napping Princess
Synonyms: Napping Princess: The Story of the Unknown Me, Ancien and the Magic Tablet
Japanese: ひるね姫～知らないワタシの物語～

Information
Type: Movie
Episodes: 1
Status: Finished Airing
Aired: Mar 18, 2017
Producers: Production I.G, VAP, Yomiuri Telecasting, HoriPro, Bandai, Warner Bros., Nippon Television Network, Lawson HMV Entertainment, Hakuhodo DY Media Partners, Nishinippon Broadcasting, Hulu, Kadokawa, KDDI, Sapporo Television Broadcasting, Miyagi Television Broadcasting, Shizuoka Daiichi Television, Chukyo TV Broadcasting, Hiroshima Television, Fukuoka Broadcasting System
Licensors: GKIDS
Studios: Signal. MD
Source: Original
Genres: Adventure, Fantasy, Sci-Fi
Duration: 1 hr. 50 min.
Rating: PG-13 – Teens 13 or older