The announcement previews animation footage from the movie and features the voice of actress Mitsuki Takahata, who will play the protagonist Kokone Morikawa (pictured). Hirune Hime will be Takahata's first voice work in a feature-length production after having voiced roles in Karl to Fushigi na Tou (2010) and Hana wa Saku: Touhoku ni Saku (2014).
Hirune Hime is set in the Kojima region of Okayama Prefecture in the year 2020, two days after the scheduled Tokyo Olympics. Kokone lives together with her father, who is always working on modifying cars. As she begins to investigate a strange dream has been seeing over and over, Kokone learns a secret about her family.