Yamada plays the lead character Atsuya who grew up at an orphanage. After doing some evil deeds with his childhood friends Shota and Kohei, he hides at an abandoned house which used to be a general store named Namiya that was known for being a place where people could come to seek advice for their troubles. While at the house, Atsuya finds a letter written by someone 32 years ago in 1980 asking for advice on a problem in the post box and starts to interact with this person through mail on the behalf of the store's owner Namiya Yuji (Nishida). Gradually, the secret behind the store is unravelled through the mail correspondence.
Yamada who is working with Nishida for the first time in a Higashino adaptation work, commented that to be able to work with Nishida is a great honour and he hopes that he will be able to learn a lot from Nishida through the collaboration. The movie is a challenge for Yamada as there is the constant shuffling between past and present so he hopes to be able to show the emotions of his character. As for Nishida who plays Namiya Yuji, the owner of Namiya, praised Yamada for being a talented actor and said that he is a perfect fit for the role of Atsuya.
Filming will begin in January next year.
Sources: Nikkansports / Sanspo / Sponichi